we got lucky with an $850, used trek T100 after some tweeking it fits pretty good and yesterday we road the Copper Triangle over 3 mountian passes in CO. 78 miles and over 5000 ft of climbing. the only regret was that it's only a 21 speed and we spun out at 48 mph. and what blew past us? another tandem! This was our first big tandem ride and it was alot of fun. We are hooked, so I guess my point is, don't cancel out used bikes.