At least on ticketmaster you can still technically buy tickets for 50 dollars, although the seats are shitty. I don't know how it is in Europe but in U.S. the best seats are sold way before the general sale even appears. That's why you see tickets for 1,000 + for first couple of floor levels which is ridiculous. Obviously someone is buying them, but it's not like they have a choice. It used to be possible to get floor seats, and good floor seats on ticketmaster, now the only chance of getting such seats is either A. wining them B. paying insane amounts of cash