I guess the pink color is the big "deal"? All DSi systems were reduced to $99 AFAIK, and DSi XLs all went to $130. Who would want an ugly pink one anyway (other than a pre-teen girl)?!?!
At the Englewood, Florida Walmart they have tons of DS Lites for $99 but don't remember seeing any pink ones. They do tend to demand a higher price. I don't know why? I assume most guys wouldn't want to be seen with a pink device.