This deal has ended.
Office Depot has the TomTom One Portable GPS System for only $129.99, after this $50 mail-in rebate (through 5/24). Featuring a 3.5" LCD display and voice-prompted navigation, it also comes with maps of the US and Canada pre-loaded on its memory card with millions of points of interest (hotels, gas stations, ATMs, etc.). Delivery is free, as is local in-store pickup where available; sales tax is charged in most states. This is the best deal I've seen in 6 weeks (it was briefly $120 then).