I have a 29 classic that is used very little and looks brand new (very light cylinder drag). Got it for $500. Problem is that it is blued and has a long barrel. Not very convenient for woods carry. I would rather have a 629 stainless with a 4" barrel. The guy at the local gun shop offered a trade: he has a 629 with a 4" barrel, stainless. He said he bought the gun personally about 10 years ago. It looks like it is in excellent condition. He offered $600 for my gun, plus I would pay him $100 dollars extra. Two problems: I don't know if this is a good deal; I don't know how to determine if his gun really is in good shape. Any thoughts and guidance would be appreciated.