I know ebay is a dirty word around here, but it is a good gauge of what is hard to find in general (specific areas where your local store has 20 copies of Mario DDR notwithstanding

).
A quick search of completed Pink DS Lite auctions (leaving out ones bundled with games) gives me the following prices: $175, $158, $186, $170, $190, $180. And each of those had $10-$15 shipping on top of it. So, while it isn't nearly as hard to find as the Wii, that is an indication that they are moderatly difficult to find. I'm quite surprised actually, as I figured they'd have a hard time selling pink ones. Even my 9 year-old daughter thinks they are hideous. Though I guess I shouldn't be surprised - the pink Nintendogs bundle last year was harder to find than the Teal one.
Black ones seem to be less in demand: $172, $172, $158, UNSOLD at $170, $147, $153, $161, $166, $152. So, a *very* slight premium for these.
Surprisingly, white ones are selling for $150-$170 and maybe just a hair under the average pricing of the black ones. That astounds me as I DO see those everywhere.
But things are goofy now. Red GBA SP's are selling for $140 or so :shock:.
Edit - by the way, Mario DDR's are selling from $90-$160 (with a lot of variation for some reason) and Gamecube Gameboy players are selling for $100-$130. It's that crazy time of the year!