It's been a tough time for handheld game systems that aren't phones or tablets. Sometimes, the only real solution is a price drop.
Nintendo is lowering the prices of the Nintendo DSi and DSi XL, the larger-screened version of the DSi, to prices that, frankly, most people probably imagined they'd be at anyway: $99 and $129, respectively. These prices take effect May 20. The Nintendo DSi currently has an MSRP of $149 while the DSi XL is $169, which seems ridiculous considering the more powerful but more battery-challenged Nintendo 3DS now costs $169.
Meanwhile, the Nintendo DS Lite continues to sell for $99, which is the version of the DS without any downloadable game service or cameras.
It's a good philosophy to make the razor as cheap as possible to sell more blades: the blades, in this case, being older Nintendo DS cartridges. As summer vacations approach, at least it's smart timing.