[cmccuist]

I just rebuilt my craftsman 5 HP/30 gallon for the second time. Sears sells a piston kit for about $45. I bought that one at a yard sale for $50 though, so I really don't have anything invested in it.

It's LOUD though, but pumps up pretty fast. And I like the portability and size. If all you're doing is air tools, but no grinding or sanding, I'd look on Craig's list for a 5 hp. Should be able to get one pretty cheap.