I bought a used Frankford Arsenal tumbler about two years ago. Cost about $40 shipped (fpund out later I could have bought a new one for about the same).
I used it like crazy (I'd been saving brass for the last couple years) and one day it quit. I took it apart and found a broken wire. Used a butt splice to fix it and it worked for quite a while.
Eventually the motor quit. I called Frankford, told them I had bought it used and asked if I could buy a motor. They said Hell no, just send it back and we'll replace it. Cost me less than $10 and I had a brand new tumbler.
Recently it quit, and I found a broken wire in the same spot. Fixed it again with a butt splice. Apparently the vibration is hard on the wiring splices, but it's a 5-minute fix (piece of cake).
Considering how much use I get out of this tumbler, it has been a great value, and I would not hesitate to get another. I'm very impressed with Frankford Arsenal's Customer Service.