Is it legal? Save sales tax credit on cars bought and sold at different licensed dealers?

I live in Tennessee and I recently bought a %26quot;new%26quot; used car from a broker that purchased it at an auction. I then sold my car to the a local dealership the same day I paid for the new car. The broker was able to bill the dealership for the sale and credit me that sale to save on sales tax. Is this a legal transaction or should I keep it hush hush?

Is it legal? Save sales tax credit on cars bought and sold at different licensed dealers?

I%26#039;m not 100% positive on TN law, but isn%26#039;t sales tax payable when you register the car? If so, you%26#039;re fine.