About 3 years ago I sold a small-framed Trek 560 in Reynolds 501 (not 531) with Suntour AR for $360. It was in excellent condition though.
Admittedly, I couldn't sell a De Rosa for that much around here today, but that's just because of the way things have deteriorated locally. However, it does go to show that (some) people hold almost any steel Trek in high esteem.
Personally, I think these old Treks could go toe-to-toe with any other maker.
So Septacycles! - Did you get it???