While it seems to be all but a sure thing that all three Xbox 360 SKUs will be getting a price cut on September 7th, if you need a bit more reassurance, you can now take comfort in this apparently authentic Best Buy ad provided by a helpful tipster, which should be making an appearance in paper form just in time for the big day. Just like Radio Shack's, this one lists the Arcade, Pro and Elite for $199, $299, and $399, respectively, and, unsurprisingly, there's no mention of a motion controller with any of 'em.