The used car market is on the rise, with CarMax and its competitors experiencing revenue growth rates in recent years. The company's success can be attributed to identifying different market segments to target, including students, families, baby boomers, and singles. These segments have unique preferences for vehicles, such as compact cars for students, SUVs for families, and downsized vehicles for baby boomers. Additionally, millennials are more likely to purchase used cars due to lower income compared to previous generations. The marketing mix for CarMax includes a product strategy that focuses on key products and features that differentiate it from competitors. The company's success is also driven by its ability to capitalize on trends in the used car industry, such as the increasing popularity of compact crossovers and large SUVs.