Just in case all of those retailer circulars from Best Buy, KMart, et al, wasn't enough proof of an Xbox 360 price drop coming on Sunday, here's one more tidbit of proof.

A GameStop employee has sent us cell pics of the internal announcement for the coming Xbox 360 Pro price drop announcement. They also included pics of the shelf art all of which will go on display on July 13, the day before E3 kicks off with Microsoft's press conference.

So, while still not official, it seem pretty clear that come Sunday you'll be able to pick up an Xbox 360 Pro (aka Premium) for a penny shy of $300.

If true, I can't help but think that this means that Microsoft wanted to clear the decks of pricing news to make room for something more interesting, or at least they want more attention on, come their press conference. Motion controls? Minority-Report-like interface? Who knows.