You can't buy the true VIP service. You have to truely be a VIP or know someone. My husband was lucky enough to have that experience for a few hours last May. He was with a co-worker of his, that knows people way up the Disney food chain.
He was given a free ticket to the park, a personal tour, a couple passes that worked like fast pass (they didnt get to cut in front of other fast pass holders), and they spent some time in the VIP lounge. Dh got to ride on a segway while he was in there. They warned him when they went in that they could be asked to leave if a true VIP needed to use the room.