Probably coloring and real hair extensions added. Or maybe she got it micro braided. Which can take 2 all day visits to complete. $500 isn't much depending on what you're having done. My ex use to have salon visits that would last 11+ hours. $40-50 an hour for a good stylist isn't bad at all. And that's not even factoring in the costs of any extension or supplies they use.
You know how I know your gay?