on the east coast its goes like this

bomb bomb(haze, sour diesal...ect)$20-$25 a gram
headies(real good weed, but not AS good as the bomb bomb shit)$15-$20 a gram
regs(good nugs decent trees)$10-$15 a gram
mids(bricked weed)$5-$10 a gram

thats how it goes, and for all you brits, cut the prices in half and thats what it would be in pounds