It does though. If you employ agents, you have to pay them, which increases your costs. If you're buying for yourself, you only pay for the cost of the item. So this would do exactly what everyone is recommending per economic theory - raise costs for scalpers, keep them sane for everyone else. Purchase limits provide an easy selection mechanism between scalpers and others.

Also, in a situation like this, how many people would choose to be an agent for someone else, versus buying for themselves?