When they later searched Sullivan's car they found 21 packets of psychoactive substances and about 200 plastic bags.
Her lawyer, William Hawkins, told the court Sullivan had only been selling the drugs because she felt visitors to her home were "bludging" the product and taking advantage of her.
In sentencing Sullivan to nine months' supervision, Judge Bridget Mackintosh said she accepted Sullivan had "a number of personal issues and personal difficulties" and was known to the mental health services.
Her sentence included a requirement to attend drug and alcohol counselling and any other recommended programmes.
The maximum penalty for the offence is three months' jail and a $40,000 fine.