a guy who i work with wants to buy my 99 cr125, i have a brand new fatty and powercoreII silencer w/boyesen CF reeds and RAD valve, how much should i ask for it? i clean the air filter every ride and just put a new-top end in, bikes never been laid down and is mechanically sound. i plan on buying a 99 or 00 yz125, any pro's and con's about the yz's? i hear the motors are NUTZ!!!!!!!!