<prompt> Human: So I purchased my first new car in 2010. It was a Toyota Yaris see first new car. After six hours apparently telling a dealer you will spend x amount, that you dont want to haggle, and asking if they can do that is code for lets haggle for six hours, I got my car, including taxes and registration for exactly 12,000. Three years go by and its paid off completely. Two years into ownership however, every time I go in for an oil change first two years of service included in price they start offering to buy the car off me. I politely decline each time but since then every couple of months, I get ads in the mail offering to buy my Yaris off me above Black Book value from not only the three Toyota dealerships in the area but also Nissan, Kia...1. Is there a legit high demand for used Yarises due to their high gas mileage or is this a B.S. marketing ploy?2. Current best offer for my car is 10,600. I paid 12,000. 1,400 spread over five years is 280yr cost of ownership. This is unfathomable to me. I see a 14 Prius C hybrid 47mpg with good mileage selling for 14,000. I realize this is a subjective question but does it make sense to pay 4,000 will borrow 2,000 with a 720 credit score to trade my 5 year old car for a year old one assuming car in like-new condition with only one owner and 11,000 miles on it? What numbers should I be crunching here?UPDATE:Thanks for all the replies and admittedly conflicting but damn-good advice. Because there are too many variables which I cannot get decent enough info to calculate legit average agemiles of a Yaris or Prius before becoming a money pit; being able to calculate gas costs because of the variation on Prius gas based on cityhighway use I am left with having to rely on gut and instinct. Well this is rpersonalfinance so screw that. Since I cant crunch the numbers, Im choosing to not make a choice and thus sticking with my five year old Yarisshe runs smooth as the day I got her and my only gripe is no cruise control. In the mean time, Im going to take the 2,000 I have and stick it a CD. Im also going to create a new savings account and toss some money in it each month so that when the Yaris dies five or more years down the line, Ill have some money ready for the next car. Thanks again everyone!  <response>: If you want to limit your exposure, go talk to them. But dont have a single conversation about trade-in value and sticker price.Separate them. Negotiate the sale price of the new vehicle. Then, separately, negotiate the trade-in value of your yaris.If they try to change the agreed upon sale price of the new car, well, you do the math. If the 24k car suddenly becomes a 30k car when you try to trade in your yaris for 10k, they are actually only offering you 4k for your yaris.This is a common tactic. 