Hi-Standard Sentinel...DECENT quality...aluminum-alloy frame, several internal components on the small side, or stamped...learned to shoot with my Mom's Sentinel MANY years ago, and several years ago, bought another to "cannibalize" parts from to go into HER gun...$140 is not unreasonable, IF it's in very good to excellent shape...just remember that, while it IS a SERVICEABLE gun, it will not "last" like a Smith K-22 or a Colt Diamondback...that said, it IS BETTER-MADE than the FIE's and RG's...FWIW....mikey357