To throw some more gas on the fire, you have the issue of whether an online, ebay-like auction forms a binding contract. (Ignoring all the interstate problems of a small claims-level suit). What if the buyer, an extremely un-computer savvy user hits the wrong key thinking they would get more info on the product only to see the auction closed and find themselves the "winner"? Or reverse the roles where you have a seller who fails to click the correct check-box and now has an auction for a $3k item that has no protection against selling for $3 (although they intended to have such). Intent is still fuzzy.
(More importantly, even if it isn't at the time of the auction, it will be by the time it gets into a courtroom.
)
The ebay cases I've seen have gone both ways on this issue, even in the same areas, so you're really taking your chances on filing a case like this since you have no real way to gauge which way the court will go (at least as a lawyer). For a
pro se, it might not be such a big deal.