from what i've heard chi-town has pretty expensive weed, but it some of the best...i live in a suburb of chicago, about 25min away from the downtown area. in my area there is 2 pretty big dealers and a whole bunch of little gram/half gram dealers. one guy sells ounces for pretty cheap and the weed is pretty good: looks good, tastes good, and has decent amount of thc. then the other guy sells ounces for more expensive price (about 20-30$ more) but it probally the best weed i've ever smoked, my friend picks up off him too so i get to smoke it all the time. but from what i've seen in small amounts, half grams (.6-.7) are 10$, grams (1.1-1.3) are 20$, and 1/8s (3.4-3.5) are 50$.

dealers dont really make much money off 1/8s so they dont hook them up as fat as grams or half grams. anything over an 1/8 you get taxed on or have to go to one of the 2 big dealers that pick up qps and sell by the ounce.