I have a SUV that I want to sell and it's still being financed by my credit union. Can I sell this SUV by way of a payment plan to a buyer. When the buyer has paid off the agreed amount purchase price, I can forward them the title once I get it from the credit union. I live in Atlanta, GA. Please advise!

Never represent yourself as a finance office. Let the buyer take over the owed amount in the form of his/her own finance. Once you pay your part off, get the title and sign it over.
You want to be done with the sale. Wash your hands and walk away.