There are scalpers but they tend to be fraudulent or really raise the face value of the tickets. I don't mind talking with them and haggling down but if they wont budge on the price go to the next one and try it with them and use them to barter against each other.

There are a lot of shady scalpers outside Coamerica park and unless its a playoff game you really want to see I would suggest using other routes to get your tickets.