Newegg has the Toshiba Thrive Tablet selling for $379.00 w/ an $80 gift card
. This is by far the lowest combined price with an offer I have found on it.
Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16834214354
it is for the 8 gb model, which isn't very much internal memory but it has a
SD card slot to expand the memory as you wish.