I dunno how everyone feels about "crotch rockets" but i've been wanting to get one for quite some time now...i don't wanna get a new one because there so nice...and i don't wanna be like my buddie who bought a brand new one and laid it down within a MONTH and had to total it! I really just want one to commute to work and save on gas hardcore....any suggestions on good used bikes/beginner bikes?

~Stauffie