LightInTheBox offers the 7" Bluetooth Car Audio MP5 Player with Rear View Machine for $45.99 $40.79 with free shipping. That's the lowest price we could find by $9. It features a 7" display, HD FM audio, SD card slot, EQ presets, and 20Hz to 20KHz frequency response.

Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 99-cent fee.