So you would put up a $10,000 car for auction without a reserve and let it go for a $100 bid?
There is a difference between a starting bid and a reserve, I personally wouldn't sell a car on eBay, but if I did I would put the starting bid at the lowest I would take for it or do a Buy-it-Now or best offer.
You can start an auction for free at any price you want. Ebay allows you to put a reserve for a fee, so you would pay for a reserve of $100 on an item and start the bid at $.99. The theory is the low opening bid attracts more people, but then the "reserve not met" statement usually scares people from bidding. I think of my opening bid as a free reserve. Just set the opening bid to your reserve price. Someone will buy it if it is not to high.