I actually had a launch phat DS , I got it used , but there wherent enough games for me to keep it ( though I played Mario 64 DS a lot ), so later on it got used more by my younger cousin , and than Ive just gave it to him ( it was allready in a bad condition ) . I still play some newer DS games here at the DS boots , just that I cant find them to be fun enough ...
The price of a DS and games for it is pretty low , so luckily there is no financial issue , just that I dont think it worth it , at least not for me . Oh , and did I mentioned that I felt like stabing Sony in the back when I used to own it ? :P
Just as a sidenote , for anyone who says that Im a onesided Sony fan : I used to play on the Gamecube much more than on the PS2 untill ~ the end of 02 , and my favorite handheld was the GBA , just that now the PSP is a much batter option for me ...