I am quite happy with my CBX600. Since it is a vintage bike you must be aware that there will be some things to check. First the sound of the engine of course. What shape is it in, it is difficult to find spares, so you do not want to find too much wear and tear and rust overall on the bike. Front fork leakage? Back suspension system, ride the bike hard on relatively bumpy road and see if is too wobbly. If that is the case to need to fix the suspension.