actually i have a freind who tokes he knows a dealer who really hooks him up so im giving my friend the money to give me pot in return and how big should the chunk be the dealer usually packs it fluffy and un compressed and how many grams does it take to get a person high (200 pounds 5'3"

i am 16 btw so am still a tenager but the reason im buying so much i hear you can get a better deal buying larger quanities and it will be a long time untill i can get weed again hey how long does weed hold its potencey in a bag after buying it?