They are a lot cheaper here. I have never bought any but I often look at the price of the Costco 2-pack. It is usually around $25 so I always figure the crab are worth about twelve and a half bucks each.
The neat thing about the dungeness fishery, as I understand it, is that the legal size males no longer contribute to sustaining the population so overharvesting is of little worry. Just like with the humans, the young males get most of the action so the old guys are pretty much just wasting food. Catching the legal size ones actually benefits the rest of them. I think the limits are set to ensure that everyone who wants gets a crack at 'em (good pun huh?).