I bought this 6" from GB in July for $475 shipped, and was quite pleased. I wouldn't rate in any better than 90%, but that is just the way I like 'em. A four screw shipped in 1960. Personally I'd rather get a vintage Tyler or holster than a box that sits in another box on a shelf, but that's just me.
The 4" was a local gun show buy a couple years ago $525, it shipped in 1961. Both S prefix #s.