How much would you spend on a ticket to see your favourite band?

I want to go and see Arcade Fire live in Manchester and tickets are £35 a pop. I just spent a similar amount on Arctic Monkeys tickets and am a tad relucant to part with my money. Much more and I probably wouldn’t have. It got me thinking, how much would you spend to see your absolutely favourite band in concert? Providing none of the members are dead of course.