Geez, my niece wants this game for Christmas and it is sold out everywhere, except e-bay of course where they are selling for $50 and up plus shipping (it's retail price is $30). Why is it so popular? My husband is now mad at me because I refuse to pay double it's worth just so she can have it for Christmas (never mind I've already spent $100 on clothes and stuff for her). (I also refuse to pay the prices for the Xbox 360 off of e-bay just so he can have it for Christmas.)
I'm surprised, especially because it's been out for at least a couple years now. My DD owns the game---you can tell your DH that while it's an ok game, it's *not* worth over $50! Your niece can survive without it. 
For some reason, it always gets popular around Christmas time.
I think I still have mine from about 1996 or so! I'm sure it's much "hipper" now. 