Just bid the amount you feel is equal to market value. If you don't have any reference for market value, then you shouldn't be bidding at all. I'd never, ever put in a snipe for OVER the amount the merchandise is valued at. Why would you want something so bad that you're willing to pay MORE than it's worth? There will always be another one of whatever it is. ALWAYS. Now that being said, sometimes you're gonna be surprised at what the market bears. Maybe many times. But in the end, if you followed this tactic, you never paid too much, and you never have to regret winning something. Never be disappointed about not winning an item. It's just stuff. And barely any of it was only made once.