I separated them at first, found no rhyme or reason to the pricing. Highest priced lately , $305 was a mint Expert, but I got my Master, upgraded w/STI 8-speed, Micheline Hi-Lights, and Selle San Marcos Concors Light saddle, for $100. My '89 Expert was $135, I prefer the Suntour GPX, anyway, and it had the same frame, rims, same quality bars, etc. You're right, though, my '87 Expert is Shim 105 all around, was $100.
I'll separate them by model, leave Ironman basic as such, group Experts and Masters best I can. Hopefully, for sellers, the market will take off again next summer. For buyers, right now is just fine.
Thanks for your advice.