You only have 2 choices buying new, YZ has the best forks,preditible handling, do it all motor. The SX strong motor, hydro clutch- I,m not a believer,nothing wrong with a reg. clutch, gold chain- chains wear out, weird feeling on the ktm. There,s low hr used 05-07 250,s out there the KX once ya get the chasis balanced,install a diff. linkage arm,is a great 250, the RM has a great motor, suspension is close to the yz, quick handling bike, rm feel loose and wore out after 40 hrs tho. The cr250 has the best chasis by far,the most important thing next to suspension,which is balanced but not quite as good as the yz sss, just mid range for power tho, toughest trans and clutch, needs reed valve or motor work. I would look for a 05-07 cr250, tune the motor to your liking, after 200 hrs the cr still feels like a new bike.