Cassette Deck servicing/restoration in U.S.?

If it works, then just use it.
The cost of servicing it isn't worth it as there are many cassette decks that will perform as well or better for not much money.
B

Yeah, I may wind up doing exactly that.   I know I said there’s ‘nothing wrong’ with it, but I know, given it’s age (mid-eighties) it must need belt(s), idler, other rubber parts (I know some/most of the parts are available as aftermarket), and I haven’t checked it for leaking or bulging caps.   But I guess I’ll play it by ear.   

Sounds classic in Rockford, Illinois. 

Bring it up to voltage slowly using variac or light bulb in series, unless you've already powered it up. I would use it for a month, then open and check for bad caps. By then you'll know if it truly needs service. Fine tape deck rivals some Naks and I'm a big Nak fan. PS. You should not have a problem finding an experienced tech to work on that deck, parts are still available, I have one too.

If you're really serious, ESL, Electronics Service labs (eslabs.com)

Simply one of the best in the USA.