You can buy a gram to a half pound on a daily basis. The stores aren't linked together so you can go to all of them if you want. Most of the stores have around 15-30 different strains, maybe more or less at some stores. Prices are different depending on the kind you get. I just picked up a little Sweet Tooth and Purple Afghan today. Great deals on the both of them.
Wait a minute? So you are saying I can go to every shop and cop a half pound off each of them all on a daily basis?