A friend has a 357 Mag S&W Model 66, wood grip. I haven't seen it yet, but pics show it to be clean and even the original box is in perfect condition. I believe this is likely from the 1990's or before (I will do some more research when I see the revolver and serial number). It is not the post 2018 model after S&W brought it back, and doesn't appear to be any special model, but the standard 66. I've got a fair price in my head, but am looking to see what others believe is reasonable...and online, I've seen some variation from $700 - $1200.

I am a Smith and Wesson revolver enthusiast, the 66 is a very desirable gun. That would be prior to the internal lock, making it worth more. If in pristine condition it's a lucky find.
If you have to give $1200 to get it you will probably never lose money, start out offering $800 and see how negotiations go.

I'm basically a revolver dummy, even though I've owned a few in the past. Has S&W solved the K-frame forcing cone cracking issue since they've "brought it back"? I'm thinking about getting a .357 mag revolver and am considering a K or L frame.

Sorry, I thought I updated the story. I got it for $850. Like new in the original box...supposedly has less than 20 rounds through it and I believe it. Very sweet...