I have an Alpine MRX-M55 new in box and two Alpine SWR-10D4 also new in box.

1x SWR-10D4 $200
1x MRX-M55 $200

Accepting bitcoin or Litecoin

*Edit* Changed the price to reflect correctly.

Enjoy crisp, powerful bass while you drive with this Alpine Type-R SWR-10D4 10" subwoofer that features an H.A.M.R. (High Amplitude Multi-Roll) surround design and a CRC (Compound Radius Curve) motor structure for enhanced linear excursion.