There are so many scams on eBay motors - often involving adverts for camper vans.
In a TV programme about organised crime, a senior police officer reported that one criminal gang alone had registered "multiple hundreds" of fake accounts on eBay to place fraudulent listings for non-existent motor vehicles.
Forget about eBay doing anything - they won't, unless perhaps the seller is convicted in a court.
Concentrate efforts to identify the member responsible, and bring them to justice. It's essential to seek legal advice, partly because action to get your parents'money back may be separate from any criminal charges brought by the police.
