I run across ol revolvers all the time and don't know enough to make an educated valuation to buy or not. I see a lot of old M&Ps, and maybe they're easter eggs or not. I can usually value things that I work with a lot, but guns are not in that familiar territory. One LGD had an M&P nickel 38spl with a lot of wear that seemed to be cheap. After a close look I seemed tight and in good mechanical condition. On closer look, it was marked 32 S&W. This was the second 32 in 2 days. Both seemed to be priced right, but I just didn't have the knowledge at my fingertips. I have traded guns for 60 years now, but the market is just too complex for me to keep a close handle to spot deals. I will continue to plod on and just follow my heart and realize that I may get stuck so just make sure it's something I like if I buy it. I guess that's really all you can expect.