Zero. All grown smoke is meant for personal consumption.
Yeh, what he said. The whole reason I started growing was to get away from drug dealers and save a little money.
But, since indicas dish out alot of bud, depending on genetics and whether or not you take care of it, expect anywhere from 1 - 3000+ grams. Anything can happen.
Also, on the subject of money, I really don't think anyone could give you an accurate number, knowing that prices of bud changes often and is different in different places.