Ruger Super Blackhawk three screw

This is a very nice old three screw (1972). For those not familiar, the three screws are like the old Colts in that there’s a half cock position on the hammer that frees up the cylinder. The new model Ruger cylinder frees up when the loading gate is opened. The grips shown in the picture were bought by me. I paid $100 for them. I like them very much but if you don’t I have the original grips. I also have a letter of authenticity from Ruger. I’m open to trades but would prefer cash. Be sure and check out my other posts. I don’t travel far but do go into Helena and Great Falls pretty often