Remember that you make the most profit on small units. Usually young dealers start out with an Ounce and sell to friends, this enables them to smoke for free and have to sell to their friends. You can buy an Ounce for usually $325-400 dollars. If you make each Ounce for $480 approximately $60 per eighth of an ounce.o if you make $560 per ounce, sell a pound in grams, you can make $8,960 on a $5,000 dollar investment. Please note that the number listed is with the highest profit margins, a more reasonable number is 6,000, after smoking some, friends’ price, real world stuff, etc..