Consumer Electronics Depot via eBay offers the Pioneer 6x9" 3-Way Coaxial Car Audio Speakers
, model no. TS-A6976R, for $47.55
with free shipping
. That's the lowest price we could find by $7, although most stores charge around $100. They feature up to 550 watts of peak power, 4 ohms impedance, and a frequency response of 27Hz to 24kHz.