Quoted from RobT:Part of the reason is that they are more fully featured, and have been great playing pins. People were bitching and complaining about how cheap Stern was being with stripped playfields etc. Stern listened and comes out with more fully featured LE models, which are obviously going to cost more. So far, they haven't had trouble selling them.
I agree, I don't think Stern necessarily price gauging (well maybe just a little) but, these newer games have a lot more features that the ones from a couple years ago and so the price has to be higher. I personally will pay 6500 for a nice fully featured NIB machine but, at that price point, I will be more discriminant than at 4500. If I see more then a couple of things I don't like, I will not buy, whereas for 4500 I will be a little bit more forgiving. In other words a 6500+ machine better blow be away, totally, thus I still haven't made a NIB purchase.