Hi all, I am in the market for a GP100 and I thought I would check out a local gun show this weekend just to see if I can come across one, or a similar .357, in a really good used condition at a better price than new. I'm in no immediate hurry and will buy new if I don't find anything that knocks my socks off, but thought it would be worth a try since it's a local show. Can anyone please help offer some of the things that I need to check on a used revolver to make sure it's in good shape? Is there a good way to quickly check the cylinder to make sure it's in good shape? How about checking the timing, etc? I admit I'm a bit new to revolvers, and I know the GP100, if I can find one, is about as rock-solid as they come, but I still would be a bit wary about buying a used gun without knowing a bit about what I'm looking for. Any suggestions are appreciated. Thanks!