That's an interesting point. Perhaps this is a way for Apple to test the market for the price point of the iPad.
My understanding is that the iPad, is not selling anywhere near potential, there are plenty in stock everywhere at the $500 price point, while iPhone are still scarce.
This could be some test marketing for a lower price point for iPad.
I believe that it has nothing to do with Apple, it is not event authorized reseller...I am sure the sales would be higher with that price point indeed but i think apple isnt forced to lower price by low amount of ipad sold.