Speaking of buy it now, I find it moronic that the buy it now button disappears when even one bid has been entered for the item.

This weekend I bid for an item, then 1 hour later decided that I wanted to pay the 10% extra for buy it now, discovered to my dismay that the buy it now option was gone, thought that the seller had manually removed it, got annoyed and retracted my bid, then saw the buy it now button come back (!) and then managed to buy it now.

I have no idea why they'd make the behavior like this...