You are covered if DC shows it as delivered.
Sometimes items show delivered, but don't actually show up for a few days later. Ask your buyer to be patient for a couple more days. It will probably show up. That or she should check with his neighbors and delivery person.
If he files a claim, you win.
On the lookout for: Vick Ballard Topps Magic Black Border Auto /5.
Any other Ballard SP autos.