Writing Low Sale Price on Bill of Sale for little/no taxes
I'm just curious if it's customary for the seller to be comfortable with writing an extremely low sale price on the bill of sale of a UVIP, when the wholesale value is marked as $0. This would be for the purposes of the buyer paying little taxes when registering the car.
Example: I buy a car for $15K, the UVIP lists the car's wholesale value as $0 so we write that it was sold for $1000 so I pay little taxes.
I expect some users to say it's unethical, fraud, etc. so let's just say this is for the purpose of "research". Is this common practice?