First transaction would be outside the channel. e.g., scalper may require high-value Venmo or Zelle transaction, then enter buyer ID / name on ticket website at listed limit.
But buying from scalpers only really works when they’ve already bought out the supply. Couldn’t people just go right to the ticket site instead of through a scalper? The only way this would work is if the scalpers got all the tickets into the temporary hold, but that would be a huge coordination problem to do that and connect with potential buyers in the 7 minute window or whatever.