The source of 1. is obvious; 2. come from selling rock or crack cocaine. You start making good money when your dealing with balls (8-ball) and up, which is a half a quarter ounce, or 3.5 grams. A half a b (1.75 grams) is the lowest on this scale and what low end dealers might grab. On the street a half a b goes for $100-$125, which you can convert to about $170. The turnover is not extremely high, but the rate you sell it at is as you can easily turnover that amount in 20 minutes or less. The more balls you deal with, or sell, the higher the turnover.