I've had a bunch of different Security/Service/Speed-Six revolvers, in barrel lengths ranging from the shortest to the longest, blued & stainless.
Only really had problems with one of them.
Rugged, dependable, reliable revolvers made during the heyday of Ruger's QC.
Some of the guns really need the adjustable sights, though, when it comes to POA/POI.
On the other hand, the best of the breed I ever found was a stainless 4" Service-Six Heavy Barrel (fixed sights on the Service-Sixes). POA/POI matched with various loads at reasonable distances. I like it enough to modify the grip frame to a Speed-Six profile, and have the gun MagNaPorted and Duty Tuned (although I immediately replaced the light hammer spring installed when it was tuned with the standard factory spring, since this was an off-duty weapon). I kept it, although it doesn't get much use anymore. never plan on letting it go, either.
Odd as it may seem, I never really found any of the after market grips to fit my hand as well as a Tyler T-Grip on these guns.
I think Ruger did themselves a disservice by discontinuing this line, although the GP-100 line is serviceable. I just don't feel like owning one, although I may eventually pick up a 3" model ... maybe.
I agree that the higher than original retail pricing isn't wonderful. I doubt I'd pay more than $200 for a good one, and that's one that I could personally hold and examine. Of course, I've already had my share of these revolvers, so I can afford to feel that way, I suppose. Whatever the market will bear will set the pricing ...