online auction site "Comic Connect" for $1,000,000 topped the list for a few days. It was quickly eclipsed by a CGC-graded 8.0 Very Fine Detective #27 (the first Batman comic book) at Heritage Auctions, which realized $1,075,500. In July 2010, another Action Comics #1, a CGC-graded 8.5 was reportedly sold between an undisclosed buyer and seller on "Comics Connect" for $1.5 million, thus setting the current record for the highest sum ever paid for a comic book. Conservation of comics To preserve comics, which are a printed medium, it is prescribed that they be stored in cool, dark places, as sunlight can bleach the inks and yellow the paper stock. Some collectors advise against storing comics in cardboard boxes, or using backing boards, as these are both sources of acid which can react with the fibers of the paper of comics, eventually destroying a comic. If these products are used to store comics, these collectors advise using products marked as acid free. PET film, polyethylene or polypropylene storage bags are popular, and allow a comic to be "bagged" in a contained environment, and have become the traditional way of storing comics. Some comic shops now sell comics already in bags, although the quality of the bag can vary. These types of bags are not considered "archival safe" because various plastic compositions may contain elements or have other properties that could harm the comic in years to come. Mylars are the only bags available that are archival safe. Corrugated plastic boxes, preferred by some collectors, offer greater protection against acid while also offering better protection against moisture damage and vermin damage. Original art, typically 11x17 bristol boards with the pencils and ink, can be protected against direct sunlight as well as acid deterioration by using an archival quality frame coupled with glass which has been treated to protect against ultraviolet rays. In the column Comic Book Vitamins on the Project Fanboy website, Steven Sykora discussed preserving collections by submitting comic books to the CGC, where comics are inspected for flaws, graded accordingly and placed in an inner well – a sealed sleeve of Barex, a highly gas-impermeable plastic polymer. Then, the comics are sealed through a combination of compression and ultrasonic vibration in a transparent, hard plastic capsule. This process is often referred to in slang as "slabbing" and there is debate as to whether this provides better protection for the