In this guide I'll present you the most realistic way of dealing drugs as a ghetto dealer which means you're slanging a few grams, maximum an ounce at once and not quarter pounds or kilograms. You're a simple 'corner' boy who deals drugs for someone else, you're at the bottom of the hierarchy, or you're pushing drugs for yourself struggling to make a living.
Never keep your drugs on you. Makes total sense, no one wants to get robbed and lose his drugs for the simple fact that he'll have to pay for the drugs from his pocket and lose money plus profit. There's a lot of ways to do this but here's some of the most common ways a drug dealer acts: if there's a pay phone near you, then you can hide a few grams inside it; if there's a trash bin around you can put a bag with your drugs inside it and no one will ever think that there are drugs inside; you can have a Cluckin' Bell greasy bag somewhere hidden; you can have a cigarette pack which contains the few grams you wish to sell hidden somewhere else and so on, there's plenty of ways you can hide your drugs realistically. And with the upcoming drug system this will be possible script wise as well.
Making the deal. Talk to your customer, let him know what you have(always use a realistic slang when it comes to drug names, therefore you can follow this link to make an idea of how drugs are called by their street name nowadays) and what your prices are. Don't stick with the price you've been told by the people who gave you the drugs. Tell the customer a higher price, try to obtain as much profit as possible, negotiate. You'll take the money first and then tell him to wait you somewhere in an alley or a very shady area(parking lots, backyards, etc). Go stash your money and then pick up the drugs from your hidden spot. You'll put your money in a safe place just to be sure that you'll not be robbed when you meet him again to deliver his drugs. If he tries to rob you, all you will have are his drugs which he already paid for.
If you have any suggestions/ feel like something should be added here, PM me with your ideas and I'll look into it. Feel free to ask any questions about this as well.