I was able to get the TomTom GO 720 from Radio Shack for $240. Not sure why they were offering it for that much, but I certainly wasn't going to ask any questions.
I originally went for the TT One, but they were out (guy ahead of me got the last one), so I picked up a Mio....overheard the RS salesman trying to sell the Go to a couple who wanted the one...they didn't want it, so I snapped it up right as I was walking to the checkout.