Whenever I see a brand new, current model year bike on Ebay I am a little suspicious. Obviously certain brands are sold primarily on the internet (Motobecane, Ibex, Leader, etc.). But a brand new Cannondale, or whatever does raise eyebrows.
However, parts and accessories I have no problem with. Heck, I've sold quite a few used parts. All from bikes I've used and bought with my money.