1 Sale A Day has the Garmin GPS 18 Deluxe for $30 plus $5 shipping. Turn your laptop PC into a powerful street navigator with the GPS 18 - a GPS sensor bundled with nRoute and City Select software that automatically guides you with turn-by-turn directions and voice prompts to get you safely to your destination. I found prices on froogle started at about $60 plus shipping.
This price is good until midnight CST tonight (2/2) or until it is sold out.
Features:
* 12 Parallel Channels & WAAS-Enabled Sensor
* Available In Either A Serial Or USB Connection
* Designed To Plug Into Laptop PCs
* Offers Automatic Routing
* Voice Prompt Navigation To Virtually Any Address
Link
Garmin GPS 18 Deluxe (Turns your Laptop into a Powerful Street Navigator) $35 Shipped 
