One and two year-old Trek and Cannondale bikes seemed to be valued <50% of original cost, and this is for bikes originally costing $2k-$3k. When I looked at local CL ads, I saw prices closer to 2/3rds of MSRP. Wasn't sure if this was wishful thinking on the part of the sellers or a close reflection of true market value.
FWIW, I can't imagine buying a used bike on eBay.
Originally Posted by
WhyFi
You could check completed listings on eBay, but I don't know that that's going to be any better of a predictor. Variables like size, condition, and region can make the value vary quite a bit; these online tools might help you not get ripped off, but it's ultimately up to the buyer to determine value (by buying the thing).