1989 Miyata TripleCross Serial #RE88797- Worth refurbishing?

I purchased back in 1989 and rode it for years until it moved to basement. Now riding a Cannondale that never fit quite as well as the Miyata. Wondering if Miyata is worth refurbishing. All original parts except for wheels, seat and pedals. Or maybe I sell it??? Think it is a 22" frame.