For Sale

I'm heading off to college here in a few days, and I'm looking to get rid of some stomp boxes that I no longer use. I own a Digitech Expression Factory which is about 2 years old, and a Digitech RP80 which is about 3 or 4 years old. I'll probably take them to the local Music-Go-Round (buys and sells used instruments and gear) soon, but I was curious if anyone might suggest what I should ask/expect for the pedals. I trust Music-Go-Round to give me a fair deal, but there's not exactly a blue book for musical instruements and gear (or if there is, I doubt these items are in it).

I bought the Expression Factory for $200 (It's a CryBaby, Vox Wah, Space Station Stompbox, Whammy Pedal, Leslie, Univibe, and Flanger all wrapped in one expression pedal, with some of the most famous distortion stompboxes available as well such as the DS-1, Tubescreamer, and Pro Co Rat), and I bought the RP80 for like $100 or something (Christmas special I think).