that does absolutely nothing, you still have to pay taxes/brokerage on it, just like you would pay taxes on gift if you crossed the border with your car.
the only real way is to have them value the package at 20 dollars, but then if it gets damaged or lost you’re screwed. you can also try and having them mark it as ‘warranty replacement’ since they can’t technically charge you tax on something you supposedly already have paid tax on.