Well, I have four of them and love them. 71/2s and 5 1/2s. I got them all when new, but I find it hard to believe you could hurt them much. They do need a mite of fine tuning for cowboy action, but they are one of the worlds most fun revolvers to shoot. Load 'em up to max and they are as powerful as a Walker.
I looked at your ad and I see that it is the target/adjustable sight model. They are great for a boar hunter, but not good for cowboy action. It is a fine C&B and I am not kidding. You might try lowering the price a mite, cuz they sell for that new around where I live. Someone will want a really fine heavy duty C&B sixgun, fer sure. :-)