Mwave offers the MB Quart 12" 600-Watt Car Audio Subwoofer, model no. RLP304, for $46.67 plus $4.99 shipping. That's the lowest total price we could find by $15. It features an injection molded polypropylene cone and frequency response of 25-160 Hz.
Will your package get to you in two days if you have Amazon Prime? Well, it depends.