I use a money based behavior system in my classroom and it works wonderfully. The money I created is called "Kinzinger Kash", but the document can easily be edited to match your own name. The money also includes a palm tree to match my beach themed classroom, but you can change that to your liking as well.
I also attached how my students use their money to buy rewards. They can spend their money at the end of each week, or choose to save up for a larger prize.
I hope you enjoy this! Happy teaching!