I traded an Art knife for a minty FWB 601 that sat unused by the previous owner for who knows how long. I got it in the mail and a few shots later it wouldn't hold air anymore. I brought it to AOA and they fixed it.
Had a FX Revolution that continued to have problems so I kept bringing it back to AOA. I complained after the 3rd time so they got me into a 1st gen FX Royale. That FX Royale worked great for a decade then -
Hassle #1, it got all rusted up in a case that I won at a raffle!
Hassel #2, then it started leaking shortly afterwards. I cleaned it up some but was so disgusted with the whole thing I put the gun in a corner for years.
Hassle #3, last year I got motivated and replaced most of the 0-rings but it still leaked, grrr, so it sat in the corner until a few weeks ago when -
Hassle #4, I found the 0-rings in the reg were ruined too.
Hassle #5$ I ordered a Huma Reg and got it installed, actually not hard to do at all -
Hassle #6, but I had lost a delrin washer at the fill port somehow so it still leaked, lol?! A friendly guy was nice enough to make one for me so I was finally back in action.
Hassle #7, then I noticed there was rust dust coming out of the holes on the side of the action and near the trigger, lol. I watched a video on how to take out the trigger, did that, also took out the hammer, cocker, etc, and scrubbed everything up so that the white rag pieces I was using were coming out pretty clean.
Hassle #8, then while in the process somehow managed to push the valving out onto the floor while getting to everything in the hard to reach places, GRRR.
Hassle #9, then I put the valving back in wrong because I didn't see how it was supposed to go in, LOL, so I had to find another video showing how that all goes in.
I know how to take the whole darn gun apart now!
The GOOD, I think I'm a more patient, and a more persevering person, than I used to be and the gun currently works "I think"?! We'll see soon I guess once I get some nice weather.
There's been other problem airguns I've had but my post is already too long.