I do a fair bit of buying on ebay, never a problem
That said, I don't buy cars there. for the very reasons you gave, I want to see it and drive it
I only buy from sellers with a high positive rating, and I ask questions before purchase
heck, I bought a rack and pinion for my Lumina off there for less than $100, off a salvage yard that sells there, and, come to thiunk of it, I did buy a motorcycle off ebay, but that was from a dealer, not a private seller, and i could go to the dealer's S&B store
went to the store, looked at the bike, then bid on it
Still wouldn't have done it without seeing the bike first