What a find!
I bought a -2 back in the mid 80's for $175 in near 100% with a shoulder holster I sold for a tidy $. Still have that -2 and shoot it often.
Also have a -5 that I got in a trade for a Tec9 back in 2008, I spent like $300 for the T9. I practically ran with that 66 fearing the guy would change his mind. That -5 looked like it had never been fired, no stripe or scuff marks either. It doesn't look like it did when I got it though, as it gets carried nearly every day, and I've put a good 3K of full throttle 296 jacketed loads through it.
Both are still as tight and accurate as when I got them, but I have to be honest that I don't collect them, I shoot all my firearms regularly. Now all I need to find are a couple 19 snubs to go with my 66's.
GS