It's a toss up between maintenance and repair. Some guys run amsoil for the life of an engine, some change the oil every 2k. I would suggest that you keep it clean and in the event that you are in a dusty environment or hunting from a boat that you take the time to clean it up and dry it out. Doing so it should last forever.

Originally Posted by BrentD

I would not buy something that runs on any kind of primer given the possibility of primer shortages and even regulations. In fact, why not buy a flintlock? Really. Rocks aren't going away anytime soon.