This seems to vary by state. In Colorado, for example, a dealer is someone who sells more than three cars per year with profit in mind. So as long as you're kee

This seems to vary by state. In Colorado, for example, a dealer is someone who sells more than three cars per year with profit in mind. So as long as you're keeping each car for more than 4 months, it seems you'd be fine in Colorado. Georgia, on the other hand, defines it simply as selling for profit. So to comply with the law, you wouldn't be able to mark up the cars at all.