I am contemplating selling my Merckx for an updated model. Anyone got any suggestions on value? I think I bought it sometime late 80s or early 90s. The frame is 53 cm c-c. It is Columbus TSX tubing. The frame does have some minor paint damage from use and storage. Never been crashed. It has Shimano 600 components. Eddy pantographed stem. Shimano aero wheels. Any input would be appreciated.