I doubt we will see ticketprices in that range, unless they specifically announce it as "The Last Time". No wonder that concertgoing among people is in a downward spiral. They go about the problem in the wrong way, letting fewer people pay more, instead of lowering the prices a bit to fill the venues.
If ticketprices will be that high in the US, I seriously think a lot of americans see it as a bargain coming over to Europe, where prices is lower, in general. I think we saw that pattern during the LICKs tour, and also due to the fact that the european tickets where released in the middle of the night here in Europe. Personally, I have never seen the Stones in the States, so I will make the trip this time, no matter what. It´s just something I need to experience.