The Source has the Sirius Starmate 8 bundle on sale for $169.99 right now. You can save an additional 30% off with the promo code 039362 bringing the price down to $135.38. The bundle also ships for free.
The bundle includes the Sirius Starmate 8 Radio + Vehicle Kit as well as the Sirius XM premium sound system. The sound system package includes the Sound System, Power Adapter, SIRIUS and XM Compatible Remote Control and Indoor/Outdoor Antenna.