Some people say brick weed or swag sucks but I used to live in New Mexico right next to the border and down there you could get a quarter pound of brick for like 100 bucks and if you don't have any weed at all, swag looks like an oasis in the desert for a man who is about to die of thirst. Now, brick weed isn't all crap. Sure it has seeds in it most of the time and some of it is really crappy but some of it is actually pretty well grown. Some of the bricks would be better than others and they would have some pretty good buds in them.
I would be far more worried about pesticide, paraquat (etc.) residues than I would about quality and taste.