If it is running good, drive it hard (Fun), to drain the gas down, then fill it up, FULL, with new stabilizer, and that should be good. Newer cars need to be driven. I would never buy a car that was sitting in time. I did that one time, and I ended up with a new engine, transmission, and brake system, oh and Power steering system.
When I bought my Ford GT, I bought a "High mileage" car (13K miles), had it checked out by Rich Brooks and it got a clean bill of health. I was told that the 6K and less mile FGT's needed belts/fluids/tires.