Try bidding a larger amount like 10 or so. Also a quick heads up if you made bids on other auction your credits made be tie up. They are tie up until someone outbids you or you win the auction. If your low on credit there different ways to earn them. If you click credit you can earn credits by doing offer. Survey are good but they may take a while to finish like 15-20 minutes. They have a few offer where all you have to do is add a like to facebook for certain companies for credits. Read them careful find out what which one is best for you.
Listing stuff you don't want is good too. But everyone on listia like free shipping so keep track because it's can cost you if you list too much at once.
I hope this helps
Dave 23
P.S.
Also fan me from time to time i put on a trivia for free and give out gift cards.