Today craigslist smiled upon my poor soul and I was able to pick up this GEM.
The photos posted on craigslist were the usual poor quality, and upon calling the seller who kept saying the bike was "in pretty good shape," I decided to make the hour drive to check it out.
Immediately upon seeing it, I knew I was leaving with this bike. I cannot believe how good of shape the bike is in. There's not a single scratch on the paint!
The previous owner said he thought it was a 1983. I've searched for Miyata SN databases, but haven't found any. Here is the SN if anyone can help!
EDIT: After following leecycle's advice, I dated the Suntour derailleurs to 1979 via www.vintage-treks.com
Enjoy some pictures!