Being a broker, I have sold a lot of collector cars using Ebay. I dont use Ebay however as a viable means of closing the sale using the auction process, I always have a buy it now or clearly state the right to end the auction at any time. Many of my buyers have been people who would not have bought the car if forced to use the auction process, solely due to all the problems and imperfections that process has. Ebay is a wonderful marketing tool as far as exposure and advertisment, the sale after that can be conducted by the seller and buyer off line. As for Ebay's auction process, I think it can still work well for smaller less expensive items like parts, it has been a blessing in that regard as what used to be a several month or longer swap meet search for that "Special" part, can now be located in a day.
The exposure and advertisment can be seen right here on this board, not much gets by this crew, good or bad. It also can help a new person to the hobby that may not know if the car they want is correct or a good buy, automatically they have the resource of many knowledgable consultants who usually come to a group conclusion as to the validity of a car. As with anything else, using caution, Ebay can be a thing where you take the good and leave the bad behind.
Motown