In 2016 a festival took place over 3 days that had Paul McCartney, Neil Young, The Who, Roger Waters, The Rolling Stones and Bob Dylan performeing complete sets. Tickets ranged from $199 thrut $1599 to "as much as people are willing to pay" for the best seats/VIP packages ect.
This all took place at the Desert Trip festival in Indio Southern California which is in the Colorado Desert. So getting there, and back over the three days would present a whole set of problems in its own right.
Premium Seats are sold directly by Desert Trip through Viagogo and are not resale tickets. The price of Premium Seats varies with demand and all seats are guaranteed by Desert Trip.
Premium Seating is currently sold out.
Viagogo, StubHub, GetMeIn and Seatwave are ticket reselling sites where officially or unofficially people can resell ticket's from below facevalue to as much as someone is willing to pay, like stuff on eBay.
Viagogo are much in the news at the moment because Ed Sheeran had decided that he would not accept resold tickets at any of his gigs. And only viagogo refused to comply with this, so people holding tickets purchased via viagogo, were refused entry invited to apply for a refund from viagogo andand offered the chance to buy face value tickets instead. This is because Ed felt that he wanted people to pay the prices that he set (£150) not the prices that viagogo set (£3000) and because presumably he wouldn't get to see any of the cash difference between the official price and resale price.
The organisers of the festival and legends / dinosaurs at Desert Trip didn't use Viagogo that way, the premium tickets were official and couldn't be bought any other way. So all the money went to the organisers and bands concerned
I think if they could get away with it most concert promoters and artists would all sell all tickets the viagogo way, it would be a lot more lucrative and organising tickets sales a lot more straightforward, the resell market would collapse and they would pocket a lot more cash. Tho clearly the public and the authorities would not be so keen.
Until fairly recently most income from popular music production came from releasing recorded music and publishing and broadcast rights. Artists went on tour principally to promote their latest album and didn't expect to make any money other than from merchandising. Dire Straits famously didn't go on tour to promote their last album because it would have been too expensive for them to do so.
However with the advent of streaming & almost complete loss of revenue from music sales the only way that artists can make money these days is by going on tour. Therefore despite the fact that touring has become much more expensive, ticket prices have rocketed.
And as the men behind the curtain have persuaded the general public that seeing bands live is the be all and end all, then many more people want to go to concerts. Despite the fact they are paying hundreds of pounds to be herded about like sheep, not allowed to leave the venue for a cigarette, sitting in uncomfortable seats listening to badly amplified poor reproductions of songs, from so far away but they are better off looking at screens, surrounded by people eating hot dogs.
The O2 is one the largest music venues in the UK but only holds 20,000 people. For popular events maybe half a million people would like to go on any given night. That makes holding a ticket for that given night a very rare and precious commodity, which is officially re-sellable via seatwave.
So the answer to the question is you can always get tickets to go and see any concert that takes your fancy, just as long as you are willing to pay the price that the market demands. As I'm sure that if you had really wanted to see Ed Sheeran play, despite his histrionics,, though god alone knows why, and you had your people ring the venue and offer £100k for box, they would have made one available.
