Comment by jelicicm

Knew what car I was interested in. - narrowed down the search to three different brands/models and wrote a scrapper for a local used cars website. Then this scrapper built up a DB of info about cars available, and I was able to easily query them, and have data about how long were those cars up there (how long from ad to sale), plot price graphs etc. Bought a car with 10% less than the AVG price for the brand/model/year, with really small mileage.