I think our best prices last year were $459 at a dealer, + tax. Again, that was a year ago and it was for a blue .357. Since MSRP on Blue is $65 or more for blue vs. SS, I'm not sure if that's as sweet a deal as it sounds. But it seems the street prices of blue vs. SS is about the same.
A place I go to get "street" prices is Bud's Gun Shop. They quote "delivered" prices, which is what you can pay plus an FFL transfer fee in your area. I am always willing to pay a little more to support a local dealer. We need to. Here's is there Ruger SA page as of today:
http://www.budsgunshop.com/catalog/index.php/cPath/21_49_118
Long story, we ended up not buying a new one, because we walked into a local gun show and a guy had an ANIB one, with ALL papers, wrappers, inserts, etc., including the original brown cardboard shipping box the red box went into. All ANIB, and it was a 1973 "1st Year" New Model Blackhawk, .in .357 and 6.5" (what we wanted - this was a gift, and the recipient was quite clear in preferences for a New Model, 6.5", in blue). Stunned, we quickly handed over $375 cash OTD. The box had the original 1973 dealer sticker price on it, $101.10.