You can see from my signature I've found a few. In addition I've built up a few 710s for family.
The late 80s 310s / 312s (700c wheelset and not 27") are quite the value, just slightly longer than 710s / 912s and more stable riding than the pro series. You get a better fork and components in the 6xx series and above. You used to be able to find 312s for $200 or so.
I have a '90 japanese Schwinn Voyaguer, very comparable to a Miyata tourers. The lightweight imported japanese Schwinns of '85-90s may be under-valued compared to Miyatas, but they are getting "discovered" too.
'94 Barracuda AB2 Tree Amigos
Specialized Roubaix Comp
Miyata '91 Alumicross
Miyata '89 312
Miyata-Univega '84 Gran Turismo
Miyata '82 Twelve Hundred
Miyata '72 Racer
Giant Suede '05 e-bike conversion
Last edited by FrenchFit; 05-07-12 at 08:38 AM.