The problem is that there are way too many people to whom $300 is pocket change and perpetuating exploitation does not bother them.

Scalpers put the items multiple times to ebay, with the intention to make the general price high, and also giving a "cheaper" option that looks like a deal. Even if its still higher than the original price. Getting the controller for 220 sounds like you got a good deal if most other sell it for 400. And there will always be people with more money in their pocket than the rest, who do not care what effects it has when purchasing it from the scalpers.

You are asking gamers, the least scrupulous set of consumers on the face of the earth, to demonstrate patience.