I have no problem paying that much when it's someone I care about seeing. I didn't think twice about paying $70 for Sunday's Alice Cooper gig, for example. Maiden are at least £50/$80 whenever they play.
The most I've ever paid is £65, which was for Metallica in Copenhagen.
29/5 Dylan Moran
3-6/6 Sweden Rock Festival
19-21/6 Graspop Metal Meeting