The incentive should be competition with other manufacturers who are also offering fixed pricing. More transparency will benefit consumers.

Haggling over prices does not benefit consumers, just like haggling over wages doesn’t benefit employees.

The Carmax approach is great; clearly people are willing to pay to avoid all the normal hassle. Maybe their prices aren’t the best “if you know anything about the cars” -- where does that secret knowledge come from? Wouldn’t it be good if there were multiple Carmaxes and they had to compete on price and service? As long as the real prices were listed on the web and were always the same for everyone.