I came across a fella that has an old browning buckmark he's had "over 15yrs." It has been laying around is his closet and has only had about 20rds through it. It was crudded up a little, but a little cleaning and I think it's 95 - 98%. I'd like to buy it and he wants me to make an offer. What would this pistol be worth? I looked on gunbroker and the new ones with the truglo sights are going for over $300. I can give any you detail you ask for. Thanks!!