This brilliant piece from Vice, written at the time Vice was good, provides a good description of some of the shenanigans that's been going on.

I think it also serves a useful reminder, relevant for Liverpool fans as well, that the price of the tickets bought from the club is only piece of the puzzle, because a great number of the spectators at Anfield have had to buy their ticket secondhand because of a lack of availability. Clearly, the face value of the tickets exceed what the club is raking in; that should be remembered in the talks of FSG being greedy and all.

Increasing the ticket price doesn't help when you've got tickets immediately bought out by resellers, creating artificial demand and then selling the tickets slowly at a markup. They won't sell them all, but at double the price they only need to sell half of them to make their money back.

In some cases tickets went to resellers before they were even on sale to the public.