Parts not for resale

The words establishment, operation or maintenance of a motor vehicle junkyard or motor vehicle junk business shall include the accumulation of motor vehicle parts or old iron, metal, glass, paper, cordage or other waste or discarded or secondhand material which has been a part, or is or was intended to be a part, of any motor vehicle, the sum of which parts or material shall be equal in bulk to two or more motor vehicles, whether or not the parts are for sale or resale, or whether or not intended for use or display.