gotta remember, the "rare" ( or valuable ones) were the FEW that were made back in the 70's the new ones are a different lot & breed, and the price of NEW cylinders is somewhere around $107 last we checked....
also got to keep in mind that Ruger does NOT always have them "in stock" and remake them from time to time, so its a matter of "timing" also..................last one we sent in for a freind, they held onto the gun until the time they made some MORE cylinders..............otehr times we've been told, NO< threyare NOTavailable, again, all depends on who and when you talk with them...go figure