I'm thinking of selling my mid-80's Trek 520 in favor of a recumbent bike due to a bad back. I bought it brand new around '87 or so and have ridden it off and on for all these years. It's bone stock with Shimano 3-speed Bio Pace chain wheel setup and a 6-speed cassette. I've only changed out the seat for a Brooks B-17.

Can anyone tell me the value of the bike? I'm going to list it in Craigslist in Portland, Oregon.

Mechanically, Its condition is excellent. It has a few scuffs and scratches on the paint from being moved all over the country when I worked. (I'm retired!) I love the bicycle but my back is giving me too much trouble to continue with a standard bicycle frame.