higher prices usually means higher quality, but always beware of the asshole rippoff dealers!

ounce = 28 grams = $250 - 450
half ounce = 14 grams = $100 - 200
quarter = 7 grams = $60 - 90
eigth = 3.5 grams = $ 30- 50
dime = 1.+ grams = $10 - 20

In the Netherlands though prices are much cheaper due to the regulatory style. It generally costs like about 7-8 Euros a gram for REALLY good bud like NYC Diesel and AK-47.