I found a cool Limited edition Mountain dew Xbox here in Omaha, tho not super rare, it's super cool.
The Mountain Dew Limited Edition Xbox was only available through a Mountain Dew sweepstakes requiring loyal Dew-drinking Xbox fans to amass 550 points in order to "buy" the Limited Edition Xbox. The sweepstakes spanned 5 months – from April to August – in 2004. Production numbers seems 5000. The Mountain Dew Limited Edition Xbox was neon-green colored and had a special jewel atop the Xbox that had the words "Limited Edition" and the Mt. Dew logo under the Xbox name. Included with the neon green console was one of two games: Project Gotham Racing 2 or Amped 2.