Reel to reel repair - is it worth it?

Inherited a Teac X-3 reel-to-reel from my father, along with some tapes he had recorded. In anticipation of getting it, I even bought some more pre-recorded tapes off Ebay. After I got the Teac home, I found it didn't work (reel won't engage when "play" is pushed). Only repairman in town gave $150 estimate. Is this reel-to-reel worth $150 to repair? Hate to just throw it in the trash as it has sentimental value. Even though I have no experience with these kinds of repairs, is this something I should try to repair? I can take apart anything. Fixing it and putting it back together again is another story. Any thoughts?