I found a number of years ago that the only way to deal with GB, without driving yourself batty, is to decide what you are willing to pay for a given gun and bid that. If someone out bids you then it wasn't meant to be. There's no way to know that if you had bid another $10 or $20 or what ever, the guy who wanted it more wouldn't have out bid you anyway. It's only stuff so move on.
Dave