This is another problem with charge back, EBay is screwing you? Do you want to be black listed from eBay all of your life or lose that $100? Can you dare to chargeback Apple or Google?
The one time I thought it would not work it did. Home depot rental generator that failed to run under load; store manager refused to test the unit under load as it was against store policy. Refused refund and instead gave me a $50 off coupon. I then called Chase, explained the situation and charges reversed on the spot. I took the coupon and bought a nice corded Milwaukee sawzall.
Hertz tried something similar when I was a new immigrant (it was weird and seemed hyper-scammy anyway). Pre-paid for a rental to the airport, show up to get the vehicle. "System says we need to do a secondary ID verification, enter your SSN into the pinpad in front of you"... "System says there's an issue validating your SSN against your DOB" (no shit, because I'm an immigrant whose SSN wasn't issued til I was 28 years old).
Fine, already pulling up a map to Enterprise, "just give me a refund".
"Sorry sir, prepaid rentals are non-refundable".
So you take my money, refuse to give me a car, and want to keep my money? No. Let's talk about chargebacks.