... cancelling the transaction after the auction had ended?
I bid on and won a cotbed. It was pick up only so I immediately emailed to ask their address and arrange a convenient time to collect it. I din't pay via paypal because they wanted cash on collection.
I heard nothing from then for a day, then got an automated email from Ebay saying the transaction had been cancelled.
I contacted the seller who replied that their SIL had announced she was pg so they were giving the cot to her.
But the auction had already ended. I'm not too impressed!