Wait on it... I bought one when it first came out, and other than Zelda there are no good looking games for it out. The price drop was due to how poorly it was selling and from what I hear several companies dropped titles for it since it wasn't doing well.
The 3D is a fun gimmick for a little bit, but it often just ends up making you strain your eyes, and it looks weird if your not looking at it at the correct angle. I will say the graphic capabilities on it are pretty amazing for its size, but just keep your old DS until better games come out... I wish I had since I would be $250 richer now than when I bought it. Maybe when Star Fox 3D comes out I'll get SOME of my money's worth...
Also to you I give... a boot to the head!
https://www.youtube.com/watch?v=J5kGUW6M7W0