The deals, counsel Andrew Dawson said, happened about once a week, and he stressed they did not involve large quantities of drugs.
Graham made 15 offers to sell small quantities of cannabis over nearly six months and there were a handful of offers to supply ketamine, MDMA (Ecstasy) and LSD.
Phone data showed the defendant had tried to source 100 tabs of the latter but Dawson said that never took place.
However, an indication of the scale of the enterprise became apparent when police apprehended Graham.
They found $10,000 in cash.
Judge Emma Smith made a forfeiture order for $6250 of the sum, after police and defence came to an agreement about the proportion that came from drug sales.
At an earlier sentencing-indication hearing, she called it "highly serious drug offending".
"There was a large intent to gain profit — you are an intelligent man, you knew the maths — you were well aware of what you were doing," she said.
The judge was impressed by Graham's candour, apparent in a probation report in which he admitted his addiction issues and mental-health challenges.
He was deemed a low risk of reoffending but she said there was "very high need" to deter people who supplied drugs.
The court also heard about the impact of the court case on Graham's parents.
"They're horrified by it, they're depressed by it, disappointed in you beyond measure but you are their son," Judge Smith said.
Any parent in the courtroom could imagine how they felt, she said.
