The 3DS just got more competition. Not from Sony or another competitor, but from another, now impulse-buy-priced, DS. Nintendo just announced that the DS Lite has been officially dropped in price from $129.99 to $99.99, effective June 5. Perhaps the old SKU at the old price was what GameStop was clearing out?
The same month, six Mario games (New Super Mario Bros., Mario Kart DS, Super Mario 64 DS, Mario & Luigi: Bowser's Inside Story, Mario vs. Donkey Kong: Mini-Land Mayhem!, and Mario Party DS) will be re-released in red boxes, to "
make it easy for [consumers] to find their favorite Mario titles." Not that anyone ever had trouble finding any of these -- Nintendo announced that more than 9.25 million copies of New Super Mario Bros. have been sold in the US.
No price drop was announced for the games. Just fancy new boxes.