If you can get it for less than 500, then you have done well. Appears to be an all original '85. I believe the 83 & 84 had clamp-on shifters. Suntour Montech II derailers & Shimano Deerhead brakes with Sugino half-step crank. In good condition, they will go for 650-750 in the Bay Area. I sold mine for 700 a few years ago.

If you want a fuller discussion of this bike, try this site:http://sports.groups.yahoo.com/group/MiyataSpecTour/

It's dedicated to the Expedition and Miyata 1000.