ACEO, Original Manta Ray Watercolor on Paper, Manta Ray Art

ACEO stands for Art Cards, Editions and Originals: a miniature artwork made at exactly 2.5"x3.5", the size of a trading card. Collectors buy them as small originals, often straight from the artist.

The title describes it as an original, made by hand. For a card you plan to keep, ask the seller for a signature on the back or a certificate of authenticity.

eBay bids for you automatically, up to the maximum you enter, by just enough to stay in the lead. Much of the bidding on ACEOs happens near the end, so decide your real maximum and enter it once instead of raising it in steps.

Slide it into a penny sleeve, then a 35pt top loader, which fits a standard ACEO snugly. For a growing collection, nine-pocket binder pages keep cards flat and together.