Hi,
I agree with others about you walking away. The revolver is not worth more than $200. Sometime back I went in to a gun shop and saw two S&W revolvers that needed a lot of work. One was a 19-4 6 inch and a 36 no dash. The 19-4 had rust on two places on the cylinder and a little rust spots on the right side plate. The 36 was in worst condition with rust on alot of the revolver. I looked at both and checked the bore and I could not see any rust or pitting. After much bargaining I bought both. The 19-4 6 inch cost me $219 plus fees total $269. The 36 cost $99 plus fees total $138.
Bottom line, as much as you might want to buy a gun at a shop over paying for a revolver that is not in great condition is wasting money. Some of these gun shops and pawn shops think they can now ask insane prices for poor condition guns.
Its better to be patience and wait for a fair deal. Here is my 19-4 after I cleaned the revolver. It turned out ok. The 36 I am about ready to reblue the revolver.
Howard