My thoughts on this are that ebay should be treated as any other marketplace, even though ebay does make a lot of money for hosting the marketplace.
People should be responsible for the transactions that they make.
I myself have thought (dreamed) of buying my dream car on ebay, but I wouldn't complete the sale unless I could actually see the car in person.
A 10 dollar video game I can afford to be more trusting. A $10,000+ automobile I'm gonna want to be as safe and secure in the transaction as I could possibly be.