Wanted 
 
 DOWNLOAD OUR WANT LIST 
 
 If you have any of the following available for sale or trade, please email us at CoolSerialNumbers@gmail.com. 
 
 7 in a row - $1 Federal Reserve Notes 
 
 09999999 
 
 18888888 
 
 19999999 
 
 29999999 
 
 39999999 
 
 59999999 
 
 69999999 
 
 79999999 
 
 81111111 
 
 88888880 
 
 89999999 
 
 97777777 
 
 98888888 
 
 
 
 7 of a kind - $1 Federal Reserve Notes 
 
 00010000 
 
 00090000 
 
 90999999 
 
 99099999 
 
 99909999 
 
 99990999 
 
 99999099 
 
 99999909 
 
 
 
 Super radars - $1 Federal Reserve Notes 
 
 01111110 
 
 10000001 
 
 80000008 
 
 81111118 
 
 
 
 Super repeaters - $1 Federal Reserve Notes 
 
 67676767 
 
 
 
 Radar repeaters - $1 Federal Reserve Notes 
 
 01100110 
 
 10011001 
 
 81188118 
 
 
 
 Radar repeaters - any size/type/denomination 
 
 16611661 
 
 48844884 
 
 49944994 
 
 75577557 
 
 84488448 
 
 90099009 
 
 
 
 Double quads - $1 Federal Reserve Notes 
 
 11110000 
 
 44440000 
 
 88880000 
 
 99990000 
 
 
 
 0-9 binaries - $1 Federal Reserve Notes 
 
 00090000 
 
 09999999 
 
 90999999 
 
 99099999 
 
 99909999 
 
 99990000 
 
 99990999 
 
 99999099 
 
 99999909 
 
 
 
 0-9 binaries - $1 small size Silver Certificates 
 
 00009999 
 
 90000000 
 
 99900000 
 
 99999900 
 
 
 
 1-8 binaries - $1 Federal Reserve Notes 
 
 11181118 
 
 11188888 
 
 18888888 
 
 81111111 
 
 81111118 
 
 81188118 
 
 
 
 Serial numbers X9999999 - $1 small size Silver Certificates 
 
 29999999 
 
 89999999 
 
 
 
 Serial numbers X9999999 - $1 Federal Reserve Notes 
 
 09999999 
 
 19999999 
 
 29999999 
 
 39999999 
 
 59999999 
 
 69999999 
 
 79999999 
 
 89999999 
 
 
 
 Trailing 0s - $1 Federal Reserve Notes 
 
 88888800 
 
 
 
 0-1 binary serial numbers - $1 small size Silver Certificates 
 
 01000000 
 
 
 
 Serial numbers 99999991-99999999 - any size/type/denomination 
 
 Serial numbers X0000000, X0000001, and X9999999 - any size/type/denomination 
 
 Error notes with no serial numbers - $50 denomination 
 
 0-1 binary serial numbers - $1 Federal Reserve Notes 
 
 00010000 
 
 00100101 
 
 00100110 
 
 00100111 
 
 00101000 
 
 01000110 
 
 01001000 
 
 01001011 
 
 01001101 
 
 01001110 
 
 01001111 
 
 01010100 
 
 01011000 
 
 10010000 
 
 10100000 
 
 10110000 
 
 11010000 
 
 11101100 
 
 11101110 
 
 11110000 
 
 
 
 9-digit 100000000 note - any size/type/denomination 
 
 ...and we're always looking for other cool stuff. 
 
 Contact us to buy, sell, or trade. 
 
 DOWNLOAD OUR WANT LIST ||||| Three bills with serial numbers that increase their value to collectors. From top they represent a "double quad," a "seven in a row," and a famous date -- the signing of the Declaration of Independence. 
 
 Three bills with serial numbers that increase their value to collectors. From top they represent a "double quad," a "seven in a row," and a famous date -- the signing of the Declaration of Independence. 
 
 Your money may be worth more money than you think. 
 
 Even a dollar bill could be worth enough to pay some of those monthly bills. 
 
 The key is the eight-digit serial number, and whether it seems ‘fancy’ or special to collectors. 
 
 When the redesigned $100 bill comes out Oct. 8, the one with the serial number 00000001 could be worth $10,000 to $15,000, Dustin Johnston, director of currency for Heritage Auctions in Dallas, told the Boston Globe. 
 
 But, history aside, it's mostly about number patterns. Even $1, $2 and $5 bills can be worth many face value, according to collector Dave Undis of coolserialnumbers.com. 
 
 A check of eBay shows examples, like a $1 bill fetching $86 for having the serial number 67676767, or another selling for $66.66 for having the number 00023000. 
 
 Patterns to look for include solid (every digit the same), such as 11111111; ladder (counting up or down), such as 12345678; low, 00000100 or lower; high, 99999900 or higher; radar (same backwards and forwards), such as 13466431; repeater (second half same as first half), such as 12791279; super repeater (pair of numbers repeated four times), like the first eBay example above; double quad, such as 55553333, seven in a row and seven of a kind. 
 
 Dates can also be collectible, such as 07041776 and 09112001, owned by one collector, the Globe notes. Nonhistoric dates could also be valuable, like 04171982 – if you can find someone with that birthday or anniversary. 
 
 The “For sale” list at Undis’ website asks $4000 for a 2006 $1 bill with 11111111, $750 for a 1935 $1 bill with the number 00000011, and $750 for a 1935 $1 bill with 19999999, to cite some of the pricier examples. Dozens are listed at under $100. 
 
 “The prices on my web site are representative of the current market,” he emailed. 
 
 Higher asking prices can be found on eBay, like $9,999 for a 1928 $50 bill with the serial number 00009999. The seller has already rejected five offers. 
 
 The ceiling is much, much higher. 
 
 Royersford, Pa., dealer Billy Baeder has a $10 bill with the serial number A00000001A that he believes is worth $500,000 because it's a rare 1933 Silver Certificate. 
 
 See: Royersford man has a $10 bill worth $500,000? 
 
 Anyone finding a fancy serial number has a variety of options. 
 
 Besides Cool Serial Numbers, dealers who specialize in such bills include Baeder's USA Rare, Executive Currency, , and Tickle Your Fancy Currency. 
 
 In addition to eBay, Undis says, “currency auction houses are also good, especially for the more valuable notes. My favorites are Heritage Auctions and Lyn Knight Auctions.” 
 
 He also has a “wanted” list of bills he’s looking to buy. 
 
 Kind of gives the ad slogan, "What's in your wallet?" a whole new meaning. 
 
 Follow @petemucha on Twitter. ||||| When the first new hundred-dollar bills are issued to the public on Oct. 8, the new “100” in the lower right-hand corners will shine in iridescent gold—a flashy touch to foil counterfeiters and lend the new notes some style. 
 
 But for a handful of those bills, the real value will be determined by another number: the eight unassuming digits in flat dark ink less than an inch above. Those digits are the serial number, and if the digits are just right, it could make that note worth a lot more than a hundred bucks. 
 
 Currency collectors pay handsomely for what they call “fancy” serial numbers—digits that they perceive as unusual or special. In everyday life, nearly everyone treats those digits as meaningless and forgettable. But to a collector, they transform the bills into coveted specimens, as rare and beautiful as a moon rock or an exotic Amazonian butterfly. 
 
 The fancy serial number is a curious category at the intersection of money policy and obsessive-compulsive disorder. And to look into this world of collectors is to see just how avidly humans seek and appreciate patterns—and how the value we assign to these ornate little slips of paper is even more arbitrary than we might think. 
 
 *** 
 
 The US government has not always used eight digits when numbering bank notes. The serial numbers get stamped onto the bills in order, starting as low as 00000001, and go up one at a time to a maximum of 99999999 (although they don’t always reach that high). One or two capital letters precede the number to designate which Federal Reserve bank is issuing it, and to mark which numerical series, usually starting with A, the note belongs to. Another capital letter follows it. 
 
 The simplest fancy numbers are the early ones: The redesigned $100 note with serial number 00000001 is likely to fetch $10,000 to $15,000, according to Dustin Johnston, director of currency for Heritage Auctions in Dallas. A $20 bill that was first off the press in a 2009 run sold in April for $5,581. A $2 bill numbered 0000001 with a star — the star indicates a replacement for a misprint, but the note does not carry the same serial number as the original — sold in May 2009 for $29,900. 
 
 The print runs don’t always start with 00000001—in the first six months of this year, only 11 “00000001” notes have been printed in any denomination, because the Bureau of Engraving and Printing has decided for technical reasons to start the print runs with a higher number. The low digits are therefore exceptionally rare this year. Notes numbering 00000002 and on up are worth less, but all the way through 00000100 they can sell for hundreds of dollars (with only a small premium for a $100 bill over a $20 note—since for collectors, the numbers that really count are the tiny ones). 
 
 What else qualifies a bill as “fancy” is an unpredictable set of qualities limited only by the imagination of digit-heads. One collector, a Nashville songwriter named Dave Undis, has cataloged fancy notes and presented a taxonomy on a website, coolserialnumbers.com. 
 
 In addition to the “low numbers,” which stop at 100, there are “ladders,” which have numbers in sequence, such as 12345678 or 54321098. These sell for as much as $1,300. A “radar” (selling for $20 to $40) is a palindrome, such as 35299253, and “repeaters” are notes with two blocks of the same four digits, like 41884188. Undis observes subcategories of each of these, such as “super radars” ($75 to $100) that have all internal digits the same, like 46666664. 
 
 Undis says he got started looking for serial numbers about 30 years ago, when he found a note that had nothing but 3’s and 8’s. He is now trying to find the last nine notes in a set of all 254 serial numbers consisting solely of 1’s and 0’s (“binaries”). 
 
 “Solids” are numbers consisting of all one digit, such as 22222222. “Solids are popular with Asian collectors,” Johnston says. “Solid 8’s in particular, because the number 8 means good fortune,” and collectors will pay as much as $3,000 for one to give to friends or relatives as framed presents. “The number 4 sounds like ‘death,’” Johnston says, “but I can’t think of anyone giving solid 4’s to an enemy.” Americans like 77777777’s, and a solid-7 $20 sold in 2009 for $528. 
 
 If you decide to buy stamps at the post office with your 00000001 $100 bill, the government will treat your note just like any other. But early in the note’s life, it receives special treatment indeed. The Bureau of Engraving and Printing says it segregates the bills numbered 00000001 through 00000100 from the first group of each series’ notes, and it delivers those notes specially to the Federal Reserve Bank. A Fed spokesman says those notes are then comingled with others, so that no bank that orders currency is favored with too many low-numbered bills. 
 
 Johnston says that about half the fancy-serial-number notes he sees have been spotted and put up for auction by eagle-eyed bank employees—usually vault workers—and others who work in currency-intensive locations, such as big-box stores and foreign-exchange shops. 
 
 “Often times they’ll get a brick of money and at the end of the brick it’ll tell you what the serial number range is within that brick. So they could easily tell, at least the most keen ones can tell, from the end of the brick what serial numbers are contained within the pack.” He says most banks allow employees to pluck fancy notes from the branch’s stock and replace them with their own normal notes. (Major banks such as Citibank and Bank of America wouldn’t comment on whether they had policies about letting employees pluck notes.) Every year, a few people call in after getting a fancy note from an ATM. 
 
 And then there are notes whose serial numbers are unique in even more obscure ways. Undis is looking for a pi note, with a serial number 31415927. A certain kind of numerically obsessive patriot has collected a 07041776 bill, to honor the signing of the Declaration of Independence. (Expect to pay $500 to $1,000 for this, Johnston says, if it’s a $2 bill, which shows the signing on its reverse.) The same collector also has a 09112001 bill. 
 
 Birthdays and anniversaries send people hunting for special notes with serial numbers to mark particular dates. These serial numbers, of course, look a lot like a random jumble, and are therefore harder to find up for auction, because they’re unlikely to have been plucked from the stacks. If you can find one, they’re a relative bargain, fetching only $50 to $100 over face value. 
 
 But for serious collectors like Dave Undis—he has about a thousand fancy notes—nothing beats the symmetry of a 35555553 or the consistency of a 22222222. Undis studied math in college, and as a numbers man, he has appreciation for the arbitrariness of an obsession with any one set of digits. 
 
 “If you look at a dollar bill, the number can just jump out at you,” Undis says. “You see something like a super radar, and your head says you just gotta have it.” To see fancy serial numbers in the filigreed setting of US currency scratches a particular kind psychological itch and gives a satisfaction that only a certain type of collector can truly understand. For them, money can buy happiness—as long as they don’t spend it. 
 
 Graeme Wood is a contributing editor at The Atlantic.
– We are a couple of weeks away from getting our newly designed $100 bills, and when they arrive on October 8, some will actually be worth $1,000 ... or more. No, the government isn't slipping in an extra zero. But it is including, as always, an eight-digit serial number. And as the Boston Globe explains, currency collectors will pay big if the numbers are "fancy." That's the collectors' term, not the Globe's, for serial numbers that fall in a number of categories: there are "low" (00000001 through 00000100), "ladders" (43210987), "radar' (43788734), "solids" (33333333), and "repeaters" (82118211). Then there are random ones: 31415927 (pi) or 07041776 (read that as 07/04/1776). The low number ones are among the most valuable, with new $100 bills with 00000001 expected to sell for as much as $15,000. (Before the serial number you'll see one or two letters; these indicate which Federal Reserve bank issued it. As such, there can be more than one bill in any denomination with the same serial number in a given year.) So how do you get your hands on one? It helps if you have friends in high and very secure places. Bank employees, especially vault workers, are typically able to swap out a normal bill for a fancy one, says the director of currency of a Dallas auction house, and since bricks of money are marked with the serial number range, they can spot the bills fairly easily. But no one is going to become an instant millionaire: Bills in the 00000001 to 00000100 range are specifically split up. Still, feel free to pull out your wallet and take a look: Philly.com notes that CoolSerialNumbers is looking to buy these bills. (Click for another wild money story.)