I sold two of my 500’s on eBay, and a pretty unique one on this site a while back. Don’t get me wrong Dan, I hear what your saying. I personally feel like it takes a bit of practice to figure out what works best. For a car like a 500e, I would set a buy it now option w/ a best offer. The chance of someone buying for the full price is slim to none if they know your open to negotiation. When they submit the best offer and the seller accepts they are obligated to put a deposit considering this option is selected when listing. Things tend to get a bit sticky when you setup a no reserve auction. eBay does offer some protection options under the user preferences section to avoid shady bidders. In addition they will always refund if the buyer does not follow through. I had a guy tell me he would continue to increase the price of my listing if I did not sell it to him outright. He followed through on his promise, I got refunded and relisted a week later. No doubt an inconvenience. It does seem to work out in the end though from my experience.
As far as BaT, I could not believe what they requested to list my 996TT. I simply do not have time like that to spare, I would much rather spend it with family and friends. I ended up cleaning the car prior to driving it to a good spot for taking pics and wrote up a description which took about 2 hrs total. I listed it on Cars.com with the Carfax report included. It sold less than two weeks later for $56.6k a few hundred less than my asking price. I could of only hoped the buyer knew how to drive manual.
BaT is flooded w/ Porsche’s considering the minimal amount of cars on their site at any given time. I could not be bothered with the hassle of listing it. They refused to set a reserve over $52k on my car which was the icing on the cake for me. I have no regrets. I’m almost positive people gravitate towards eBay for the rare ones which creates word of mouth. At the end of the day a good car will always sell regardless of where it’s listed under most circumstances. Just my two cents.
Cheers.