The only person more unlikely not to find a gem (gun) at a fair price other than a gun buyer who does not know what he is looking at and buying, is a blind man buying a diamond in a jewelry store. Post picture here and someone will try to help you out. But one hard and fast rule is never pay a "name" price for a no name gun. The second rule is do not buy what you do not know about and ask question like you are doing along the way. The adventure is most of the fun anyways.