The wife and I looked for a good P&R Model 13 for several years. When we did manage to find one, it would be in rough shape, and the owner would want $400 - $450, no box, rubber grips.
We finally found this excellent Model 13-1 at a gun show, and I bought it for $300 out the door (and if I ever see another 13-1 for $300, I'll sure as Hell buy it):
It had rubber grips, so the wife put on Ahrends Maple stocks. It's pretty much established that it's her gun; she lets me shoot it once in a while if I'm good.
Anyway - there is something special about the 13. I know a lot were made, yet I see few for sale. Apparently, it is the sort of gun folks just do not want to sell. The trigger action and balance are unmatched, in my opinion, even by the Colt Python.
My gun of preference has an N frame, but if I were really serious about getting a Model 13, I'd (grudgingly) pay $545. Large enough to shoot magnums, small enough to conceal, it could be the only gun you need.