Interesting points, Rockhampster. I've got 3 CO2 replicas, 2 revolvers (pellet) & a PO8 BB firer. Love the feel of them, but the disappointing 'phut' when they're fired leaves me cold. The Dan Wesson 8" in particular sometimes can't get the pellets out of the barrel. My Crosman 3576 is more accurate & has never had a misfire. All were bought new.
Some of my older airguns are 70 years old - & don't have issues. The replicas seem to be made of pot/monkey metal, even the junior rifles I own from the '50's are better made with decent metal.
All the best
Bru
Webley Mk3 x2, Falcon & Junior rifles, HW35x2, AirSporter x2, Gold Star, Meteors x2, Diana 25. SMK B19, Webley Senior, Premier, Hurricane x 2, Tempest, Dan Wesson 8", Crosman 3576, Legends PO8.