Yesterday, the Fare Thee Well shows in Chicago sold out in around an hour, with almost half a million people reportedly trying to get tickets through Ticketmaster. The shows are now seeing unprecedented demand on the secondary market, as Forbes reports, with a ticket average reaching upwards of $2,000 each night between July 3 and 5.

The most expensive ticket seems to be for the final show, with an average price of $2,143.27 and a get-in price starting at $644. The prices for the other two nights come down from that number, with the three-day passes averaging $4,493.63 with the cheapest at $1,457, about the average price of two single shows.

An agent for StubHub told Mashable that he’d never seen higher prices for a show. “I’ve been doing this nine years, and I would say this is going to be the biggest one I’ve seen,” he said. “The Super Bowl is always going to be bigger than anything. But this is definitely the biggest concert. By far. By far.”

The official Grateful Dead 50 Facebook page posted the following message after the shows sold out yesterday, noting that they will work on ways for everyone to experience the final three shows.

Thank you to all of the Deadheads for the amazing support that you have shown for the Fare Thee Well shows in Chicago! This morning you broke Ticketmaster’s on-sale record when nearly half a million of you queued up to buy tickets. If you do not have tickets, please know that we are working on various ways to help everyone experience these shows in a way that will help you share this special moment with us. Stay tuned, and thank you for showing your love, we feel it!