NH has them too, and it's some of the cheapest prices around. One of the biggest stores is right on the state line because people from MA cross the border to buy booze cheap.
It's also the only place in the area that doesn't have legal pot, and the theory is that lawmakers keep rejecting it until it's federally legal because they want to make tax money on it just like they've done with liquor. Problem is that it doesn't look like the feds are getting on board any time soon, and being the "live free or die" state with the only place with no weed when all the places its border touches have it is kind of embarrassing.