> Most people don't realize a single sensor can cost $20,000 - now imagine you have 10 of them.

True, but part of that cost is an economies of scale issue, and we are finally seeing lasers like the velodyne come down in price. The 64 laser version used in the Urban Challenge cost over $75,000. Today, you can get a smaller version for $7k. Still a lot, but the price is coming down and it's coming down fast. Even putting one of these guys on board would be a huge improvement of sensing capabilities over what they have.

Remember, people are paying $5500 for the autopilot alone and as much as $130k for the whole car. If anyone would be willing to pay a premium for some better sensors, it's Tesla's customers.