From the Toys Section:

Amazon offers the refurbished TomTom One for $47.98 after $20 rebate+free shipping.  That's the lowest total price we've ever seen for this GPS (or anything like it). Features include a 3.5" touch-screen LCD, voice guidance, optional 3D viewing, auto-rerouting, USB connectivity, and more.  The lowest non-rebate price we can find is $58 at Tiger Direct.

Here's our rationale on this one.  TomTom will be releasing a car kit for iPhone sometime between now and the end of time.  The thing is, this car kit has a GPS and Gyroscopes in it.  Since it is for Apple customers, TomTom will gouge the price, which will probably bring it in at a higher price than the stand alone TomTom you see above.  Also, having a stand alone GPS means it doesn't bug out when you get a call or get Push Facebook notification.