CBS has already sold more than 50 percent of the ads available for the 2013 Super Bowl — and football season hasn't even started yet. The ads, which range in price from $3.7 and 3.8 million for a 30-second spot, are almost as important as the football to some viewers. Deadline is reporting that, as with years past, car spots are dominating the buying. But if you have a few million laying around and are interested in buying an ad, don't wait too long — the network says it could reach sell-out levels in just a few weeks.