I found a 1985 Trek 660 online - the guy is trying to part it out but he'll take an offer on it. His components are Suntour Superbe Pro with Mavic Reflex wheels.
Only things missing from the bike would be seat post, saddle, peddles, tubes & tires.

I'm a little hesitant to post up links to the ad but I'm sure everyone who's giving a legitimate price guess knows what this frame and components would go for in good condition.