1) Confirmation box - very, very much needed. Will spare you the whole "I've accidentally bid the wrong amount, can you fix it?" trouble which will be inevitable otherwise.
2) Minimum required bid displayed in the header and/or in the bid field by default - much needed as well. Right now, you have to guess it and wait 55 seconds to try again if you didn't guess right
.
3) "You are leading an auction!" messages are completely obsolete, since they are generated right after the bid.
4) Disallow posting in buyout-only threads for people who have less points than the buyout is.
5) Disallow consequent bids by the same person. http://www.ownedcore.com/forums/news...ml#post2543395
That's all I can think of right now.