So you willing to risk your arse for the profit you can swing off a gram?
Let me tell you how my dealer operates these last few years...
No small purchases... its not wort the effort, its not worth the risk I think the equivalent minimum sale your side would be like $200, and thats only for some old customers on hard times...
No daily weekly top-ups - Wanna piss off your neighbours let some of the crackerjack mofo's who's going to be headed your way, start stopping by in the hood every day.
Tell em your rules straight, they don't wanna play that game, they can go look for some crap seedweed from a dollar merchant.
You take the risk, you set the reward level, you make the rules...
Don't be a dollar merchant.