You would have to be crazy to use auction.com! A complete scam. They change the rules as they go. It's no auction at all. The price is set and they are simply trying to amplify the purchase price. Here are the (illegal) tactics that occur in real-time:
1. They pump the price automatically after you bid. It happens in 2-3 seconds. This is simply a ghost bid to get to their reserve price.
2. The increments change as they see fit. First it will be $2,500... then changes as the time draws to close to $1,000 and then $500. Rules change as they see fit.
3. They add time. You could be the high bidder when time runs out. Then instantly they add more time (because they are pumping the price).
It's not an auction.