You could have bid 2500.01 and won. I have gotten pretty good at figuring out people high bid, I always look at what the bid was before the last bidder, if the high bidders bid is lower that what the next bid should have been then you know he is at his highest point. Example- High bid is 100, the last bidders maximum bid was 99.99, you then know that the high bidders maximum bid is 100. I always use cents in my bids, and have won some by pennies because of this. I also see what else the seller is selling, a lot of people will bid on multiple auctions and use the same maximum bid on the lots. You can also use that to see where to place your bids.