I can't help it. I keep looking at eBay (specially American eBay) for used bikes / frames and the prices are just unbelievable!. You can get almost brand-new stuff for a few hundred (US) dollars. I must say I'm tempted to get myself a new (read:used, but new for me) frame. Sizing , however, is tricky. Returning a frame 'cos it was too small or too big will not be easy.
Is there any good Internet site with sizing guides for different manufacturers?. I'm 1.78m with 84 cm inseam.