Took a chance on this one. S/N 688xxxxx Got it home wiped it down, generously lubed the pump & cleaned the barrel. Only took a little while for it to seal. left it overnite with 3 pumps & it holds. Cleaned it up again after about 30 shots & now have about 50 through it. I don’t think it has seen much use 👍 Didn’t even have to adjust the sight!