Would make an interesting “Why They’re Successful” video. If you’ve ever purchased auto parts online, there’s a good chance you’ve at least looked on RockAuto.com. Family-owned since they began in 1999, RockAuto has become a leading online auto parts retailer known for their competitive pricing. They’re also known for their series of magnets featuring customer’s cars built with RockAuto parts that are included whenever you order something from them.