Precisely. We're not talking about essential goods or services here, so protesting the injustice of crazy concert tickets is a bit comical and whiny. It makes more sense to ask why there is a market for such insane prices in the first place. Why are people crazy enough to pay that much for concert tickets? It's their fault, not the scalpers. No one needs to buy concert tickets. No one is being forced to pay for them.
Rammstein really doesn't do shows in North America very often, so that motivates people (such as myself) to pay extra for the best tickets, even if it means getting those tickets from somewhere else when Ticketmaster is sold out. The last time they toured here was over a decade ago, with maybe a few shows here and there that weren't part of a tour. Given that some of the members are pushing their 60s, I'm not sure I care where my ticket comes from as long as I can see them before they retire.
Yes, they were there a month ago as part of their North America tour because hauling their stage with them is a humongous effort. They weren't there a month ago casually.
> There were hundreds of tickets available for around $25 the day of the concert.
This was not the case in Los Angeles even for general admission or the nosebleeds, and especially not if you want to be at the very front. Why you saw $25 tickets in Philly, I have no idea. I don't think I've ever been to one of their shows in the United States where tickets were as cheap as $25 for presale.
In the northeast there are many sizable cities close together that can host bands with older venues that can be rented cheaper. In LA you have a large mass of people all wanting to see your show in one location so you charge more but transportation costs to and from the next venue and venue costs are more.
I've never paid more than $40 for a show in the east.