From eBay's Event tickets policy for sellers:
From eBay's Money Back Guarantee as far as whether or not a listing is covered:
In all of those cases, eBay is clear that the buyer must deal with the seller first before filing a dispute. The user's own story said they hadn't completed communication with the seller before they talked to eBay. (That's partly why I doubt the veracity of that story - eBay should have told them to deal with the seller before telling them that they were out of luck.)
If that story is real, that user should follow eBay's actual dispute policy and try again - and appeal if they have to, which they have 30 days to do.
At this point, eBay is fully aware that OBB ticket sales are verboten. It shouldn't matter if the tickets were electronically-transferred - they shouldn't have been sold in the first place. And, per their own policy, the sold tickets are no longer valid. Hence, buyer should be refunded.
It actually doesn't matter to eBay if the seller got a refund from Disney. The situation would be the same if Disney cancelled the tickets and didn't offer a refund to the seller. The buyer's refund is unrelated to that.
Side note: PayPal's Seller Protection says it "can" cover ticket sales - it's unclear as to when it doesn't.
Some ticket sellers have complained that it doesn't cover sellers. There are a bunch of posts from sellers complaining that a buyer disputed a sale and PayPal reversed it without any recourse, despite proof of delivery.
Correct, selling tickets on eBay is actually a huge risk to the SELLER, not the buyer, as is everything on eBay. The buyer can simply say the ticket didn't work, and get their money back. The golden rule is always "dont' sell anything on eBay you aren't willing to lose".