Originally Posted by T-Mar

+1, it's a 1985 Miyata 310. I'd classify it a very low mid-range model for the era., just above entry level. The frameset is Miyata's proprietary triple butted CrMo with Mangalight stays and forks. The derailleurs are 1st generation Shimano 105 (aka Golden Arrow). Most of the other components are a step down. Unfortunately, the rims, while aluminum, are 27" U-section Araya 18, as opposed to lighter, stronger, 700C, box section rims. Weight should be ~25 lbs and original MSRP about $325.

I'd rank the condition as average or slightly lower. The saddle and handlebar tape are torn. Tyres are worn out. Numerous paint scratches and chips. Lots of drivetrain grease and dirt.. The owner does not know how to fasten a quick release skewer, which is never a good sign. In short, this will require a complete overhaul and probably needs replacement of most consumables. Miyata are great bicycles provided they have not been abused or worn out but this one shows enough of each, that it would be a sub-$100 bicycle to me.