Toyota has announced that it has become the first single line manufacturer to sell 3 million used cars backed by a certified pre-owned program.

The Japanese manufacturer is the largest automaker in the world, so it's somewhat unsurprising that it became the first to sell 3 million used vehicles under a factory-backed program. Still, Toyota celebrated the news with some special deals for its 3 millionth customer.

Sara Hirschhorn of Chicago, Illinois, was presented with a check reimbursing her for the $22,500 that she spent on a used Toyota Sienna minivan, essentially giving her the car for free. Toyota also made a donation to the hospital that Hirschhorn works at in her name. The company noted that the Sienna was a "smart choice," as it has been named the minivan with the best resale value by Kelley Blue Book two years running.

"Our sales success in 2010 validates the tremendous confidence that our customers have in the Toyota brand," Bob Carter, Toyota group vice president and general manager, said in a statement. "Our Toyota Certified Used Vehicle program helps our dealers to build a strong portfolio of customers that frequently return to buy a new or certified pre-owned Toyota."

Drivers interested in a used Toyota or any other vehicle may want to check out New Jersey State Auto Auction. They probably won't end up with a free car, but there are plenty of models priced well below their Blue Book value.