A key factor in values, often overlooked by sellers, is condition. So often folks look at their long held firearms as in 'excellent' or 'fine' overall condition when in the collector, or resale world they are actually good to very good condition, huge difference. Not saying that you might do that, it is just very common and very natural for someone to view their possession with a bit higher regard than a knowledgeable buyer and often people are disappointed in what they find when seeking values. A gun store/dealer that would like to buy it from you might give you 60% of its value, tops, and a chain sporting goods store would give you less than half its actual value normally. I try to never pay more than 75% of a firearms value that I plan to re-sell, after I tear it apart, clean it up, correct any deficiencies, and reassemble it that leaves little profit room in the piece. The very best way to see values is to see what the current trends are, like others have said, follow the online auctions and see what folks are paying for them and 'True Gun Value' site is actually pretty dependable as they list a bunch of recent sales results of the firearm you are inquiring about. Good luck.
