I had a vendor at a gun show get all upset with me because I opened the chamber on a Desert Eagle when I picked it up to look at it. His words were "you're welcome to handle the guns but you don't have to play with them". I looked at him like he was crazy, (maybe he was) and told him I always check a gun to be sure it's not loaded whenever it's handed to me or I pick it up. He said "of course it's not loaded, I can tell you that"! Stupidity is not limited to one side of the counter.Twice I have been handed a loaded gun in a gunshop. So caution is advised on both side of the counter.
Check the chamber. There was one shop that didnt allow working the action. He is out of business now but I was very careful in there.