Earlier quoted context omitted.
Regular purchasers would learn to not try to game the auction like that any more. In the scenario you described, they are only losing out on tickets because they are getting greedy and trying to buy them for less than they think those tickets are worth. The point of auctions is that the right strategy is to bid to your price, not to try to guess what other people think the price should be. That's why they work.
Again, X is not a price it's a demand level (for scalper tickets). Everyone can 'bid their price' and scalpers will still buy out the bottom of the auction and take control of the pricing.
In theory, there may have been holdouts who wanted to get a better price, as you are suggesting, who then turn to the scalpers. Those holdouts are either (a) irrational for not bidding the price they were willing to pay or (b) not actually willing to pay whatever price the scalpers want to get.
By taking this strategy of picking a demand level X and buying out all the tickets once the supply is below that level, scalpers are virtually guaranteed to lose money.
For most goods, there is no demand that is independent of price.