Carfax was invaluable in helping me find a good deal on a car. My only former car purchase had been in lazy, small town Hawaii, where in my craigslist search I mostly met nice people with unabashedly shitty cars. Los Angeles was a different story. Carfax helped me avoid at least two scams: one in which the odometer had been rolled back and one in which the seller didn't have title of the car. I stopped even calling people when the Carfax report showed any problems. The car I ultimately purchased, I purchased due to Carfax. It was priced a little higher than the Blue Book value and had a few more miles on it that I initially wanted, so I might not have even contacted the seller if I hadn't used the license plate number on the craigslist photos to prescreen it. However, the Carfax report was easily five pages long, showing that the single seller had done every single recommended maintenance on time, at the dealership. I knew it was worth the price and contacted the seller immediately. I was the first person the buyer contacted and I met his asking price, so we both walked away from the transaction happy. I showed him his own Carfax report the day I bought the car and I think he might have wondered if he could have charged and even higher price, considering there was a verifiable record of his good service habits. I know that I intend to take the car to shops that I know report to Carfax so I can maintain the car's good record for when I sell it in the future. Before my 1 month of unlimited reports expired, I ordered the Carfax reports for my parent's cars, just in case they wanted to sell, because I think it's worth it for the seller to do a check as well. My mom found out that another dealer may have tried to offer a car for sale under her VIN number and is contacting her insurance company to report potential fraud. All around, I think using Carfax was definitely worth the money.