If third parties could make games with the quality and selling power that Ninty does they too would keep their prices up longer. (they have some good ones but none with Nintys selling power)
I also would say do not bother buying one if you think you will end up just selling it back again. ( that goes for any system) Just look at the games out and coming out. Lots of great ones, but again thats opinion. I am not going say you should or shouldnt buy one as I do not know your taste.