I would not take the owners word for it on the leak being repairable. I am sure he is not a tech. and sure he did not spend the money for someone to do a leak check but not have it repaired.
Appliance stores get used appliances for free when they deliver new ones. I doubt they will pay anything for a leaking unit.
When you go to scrap it don't just assume it is empty of it's charge. It could just be low, or full ( may have other problem and owner is just guessing a leak) of freon.
So be careful!