hey im looking to buy some used tires..must be atleast be 50% or greater if possible , these will be put on a daily driver..i.e in sig> i need 4 p225/55 r16 z-rated preferred..if u have any or know where i can get these for cheap.please let me know i have worn rear tires and i dont get any grip>fun but i dont like spinning them all the time..thanks

jason