The guy I took mine too told me I was wasting my money and showed me how to work on 'em. Depends on who you know I guess.
The worst they can say is "nope".
But it isn't that big of a job anyway. Bob Roberts and the rgvac have write ups that make it easy. The first one is really nerve racking, but after that you get a pretty good feel for it. You do need to go get a soldering Iron from radio shack, and a solder sucker, and some solder.
It's good practice.