Hello everyone, I have a question about the Colt Trooper Mark III .357. We have a family friend with more guns than he knows what to do with, and offered to sell this one to us for half of book value. Only problem is, I don't own a book. I haven't gone to see it yet, he says it's in great shape and he's taken care of it since he purchased in the 70's, I trust him from seeing his other guns that it's well maintained. He'd like me to come by and pick it up to take to the range, I'd like to have an offer in mind before doing that. Your help is appreciated!

Almost forgot, it's the 4" barrel, should be something like this, not the stainless model: http://w​ww.gunbroker.com/Auc​tion/ViewItem.aspx?I​tem=148511865