You have got to be kidding me!
This thing is NEVER going on sale. The only "deal" you'll get is in the aforementioned bundle paks, which, again, aren't actually deals. They just look like it.
My point is, look at the home systems. The only way they dropped in price is when the company did it. Not the retailers. Why do you think they always have those stipulations on the bottom of your average big box store saying: "Take 10% additional off anything in the store!"
*excludes game hardware and stereo instillation
Because they lose money on the systems if they do. The profit margin is pathetic. Retailers have to rely on the games to keep the dough rolling in on any system.
Bottom line- either it's Ebay for a deal that sounds too good to be true, or you'll have to wait for the next GB handheld to cause a price drop.
Which means you'll be waiting a while just to save a few bucks.