I remember my dad telling me how he used to buy an ounce for $20 when he was a teenager (early to mid 1960's). Probably was some serious schwag, but still. Crappy weed runs around $150 per oz around here, but expect to pay upwards of $400 for a decent oz.

It's the risk involved that drives the prices in a black market, so in places where there is very little leniency when it comes to sentencing for drug offenses the prices always tend to be higher.