So in the event of Rush... if you are a huge fan and think this is the last ride, and also have faith it is going to be a great show, and Peart not being on the kit isnt a dealbreaker... then the price is probably worth it.
Like if Rogers and Gilmour got together for a few shows and I had a chance to go, I would pay good money. I forked over some bux to see Rage Against the Machine. Never got to see them back in the day. It was absolutely amazing and they broke up/ended the tour shortly after and I have zero regrets, and am actually super thankful to have been able to spend money on that.
I'm a huge Pearl Jam fan. I have seen them like 30 times. Tickets are now in the hundreds. I have little urge to see them again at those prices.