k-ron78 said: "Setting aside all questions as to how so many prime tickets came into the hands of re-sellers, my two remaining questions are: 1) do people actually pay this kind of money to see this show, and 2) if the tickets are not sold in advance, are these high dollar transactions being conducted outside the theater just before showtime by scalpers?"
How they came into the hands of resellers is easy, too: they bought them. Also, anyone can be a reseller these days. For expensive shows with high resale value, I've been known to buy three tickets and sell two for the cost of the three. Ticketmaster and technology has made it easy for everyone to be a scalper.
That said, people do pay that sort of money, and those prices will change all the time if people refuse to buy them. I almost went to see a show this week where the $125 ticket was listed for $175, but a half hour to show time, they finally reduced it to $50.
At some point in the future, there will be a delightful overlap where ticket resellers will have overanticipated how long Hamilton's golden age of reselling will endure, and there will be LOTS of deals. And at that point, Hamilton will only be able to sell out the theater at list price with a few premiums.