Increasingly, wealthy bidders are going online to buy collector cars worth six-figures or more at auctions without seeing them in person first. Online car auctions are nothing new, of course. So far, the results for these high-end online auctions have been generally good, according to Hagerty, a company that tracks collector car auctions. But after RM Sotheby's most recent online auction, the company boasted that 91% of the cars offered were sold. While the bidding at a live auction usually lasts for a few minutes, bidding in an online auction can go on for days.