Price is affected by more than the species of lobster. What the price is in Puerto Rico is not what the price is in Boston. Oddly enough, I just googled the subject of lobster price and according to this story
east coast lobster prices are in the tank, pardon the pun.
I also checked on raising lobsters commercially. The problem is that it takes so long for lobsters to achieve a marketable size that the venture is not profitable.