Buy.com has the Pioneer AVIC-F500BT GPS Navigation System for $178 w/ free shipping

The Pioneer GPS Navigation System features a 5.8" touchscreen, maps of the US and Canada with 3D landmarks, turn-by-turn voice prompts, Bluetooth, an MP3 player and iPod controls.

New customers of Buy.com may take an additional $5 discount by clicking $5 Coupon, clicking on "Redeem Coupon" button, and searching for 209297129