Here are some tips to consider when bidding:

If there’s a Buy Out option, you can purchase the item right away typically at more than 40% off without waiting for the auction to end
Bid timing. If an item already has several bids, you stand a greater chance of getting the item by placing your highest bid in the closing seconds
If an auction listing has a low starting price or has a reserve price, try bidding up to auction early, so that other bidders aren’t attracted by the low starting price.

Try bidding an uneven amount. Thinking of spending $10.50? Try $10.63 instead. Those extra few cents can make all the difference