I can't speak about Dublin/Europe shows as I saw U2 on the 360 Tour in Ireland but had tickets. I can say that I live in NY and ticket prices DID NOT come down for the MSG shows and they played 8 nights. Tickets went insane, I even sold a pair for one show (for cost) that I had crappy seats to thinking I could get better and it was impossible. With only 4 shows in Dublin in a smaller venue I would think they follow the MSG path and will go down a little in the next couple of weeks but then shoot up.