Scott, I asked the well folks about rebuilding it but they said it'd still be well over $500 and then there would be no warranty on it and the likelyhood of something else being wrong with the pump is pretty good plus it has almost 4 years on the parts so they recommend against it. It makes sense to me since I can't fix it by myself, if it were a shallow well and something I could pull by hand I'd sure give it a shot but at 650' I'm afraid I'd get in way over my head quick.
Steve
Steve