This is particularly interesting to me as we all pay this advertising cost every time we buy a car (or any other product for that matter).
i don't think the AutoTrader CEO did an apples to apples comparison but 'imagine if you will' a world were the auto dealers were able to use the web to get there per car advertsing down to $100 and they passed along that savings to the consumer in the form of a lower sticker price!
Back to reality.