Had anyone told me that a Colt Python Target, 8" barrel, nickel, in .38 Special, that sold for $850 just two years ago, would bring north of $3k, I'd have thought the person was just nuts. However, that's the territory today.
Early last year I passed on a nice (90%) 3.5" Model 27 in blue. I could have had it for $450. A couple of months ago I paid $1k for a pristine (98%) model, and I thought I got a screaming good deal.
Pinned barrel S&W's and I/E frame Colts (Pythons, OMM, etc.) are very desirable among collectors and shooters alike. Neither are being made anymore. Strictly the market.