...a couple of days ago. I purchased it used via Gunbroker for $299 with NS and 2x10 round mags. The seller said he was the second owner. He had no photos of the gun when I bid on the gun. He warned that the NS were "rounded" due to the previous owner installing the NS and that there was minimal wear. Well....what I go was an older M40, serial number 0014XX. GSI's stamp has not been obliterated. The gun has the older trigger (the pin connecting the safety to the trigger is located in the lower 3rd of the trigger). There is a little more than just minimal wear and the NS were more than just rounded....they seemed to have been smacked in with a punch with way too much force. The safety works fine and the trigger pull seemed ok. Tomorrow (or Sat) will be a range day....I'm crossing my fingers that the gun works with no problems. If everything is fine, I will purchase a new recoil spring....maybe an new extractor....any suggestions on what else I should swap out? I may purchase new NS since the NS inserts on the gun are slightly dim already (and the sights themselves are butchered but functional). After that, I may get the slide hard crome or NP3 plated. Hopefully, the gun functions fine.....as it is, I think I paid a bit more than what I should have.