hey aaaaa8 heres what you should do:

do a shit load of research....read a lot about weed (all over the site)

learn what strains are, learn what good bud looks like, learn what grinded bud looks like....learn the ongoing rates and prices for different amounts, and try to learn waht different amounts look like...once u do that...try to buy fromt he same dealer and once u prove that u know what ur doing he wont try to rip u off.....trust me.....do it...do it