I agree that the mini Nes is for the target people like you mentioned however at least in my country it seems that only collectors get these consoles. however you think that these normal people pay those insane prices and not collectors for the sake of another collectible?
From my experience in being in retail for over a decade, yes. I've seen many grown adults brake down into full-blown temper tantrums or go red with rage over our store being out of an item during the holidays. After the fit subsides, they'll get panicky and desperate. People will wind up spending or doing as much as it takes to make sure that item makes it under the tree. It's like a real life version of the movie Jingle All The Way.
Also, for another group of people, they're willing to spend the big bucks just so that they can be one of the first to have it. To them, it doesn't matter that supply will catch up with demand or the item will be worthless after a while; All that matters is hat they have it and others don't yet.