[dkokelley]

I think the terms "no possible way" and "100% sure" are inappropriate for an economic discussion. There's always the possibility of some event occurring.

What you're implying is that there is infinite demand for a Rolling Stones concert at any price. As far as I know, this is a concept on the extreme edge of economic theory. Maybe there could be infinite demand for necessities like oxygen should we be forced to make a decision, but for a concert the notion is absurd. If the tickets were priced at $1,000,000 per seat, I doubt you would sell out.

The bottom line is that there IS an appropriate price which will maximize consumer and producer surplus utility (the positive difference between what you were willing to buy/sell the goods for and what you actually bought/sold the goods for), and scalpers/secondary markets will exist when the principal seller misprices the tickets. Without the secondary markets, that ideal price will probably not be reached, and there will be a shortage or surplus of the goods.