If you sell 28.5 grams or more of marijuana, you could be sentenced for 2 to 4 years in prison. 4 to 7 if the intended buyer was under the age of 18. Drug Dealing The amount of jail time you would receive for drug dealing depends upon the amount of drugs you were trying to sell, as well as other factors. A drug sale charge can result in a penalty of up to 5 years in state prison.