Sales tax is regulated by the state. Even though there is a general sales tax in Washington state, there is no tax on gold bullion.
Please be more careful if you are willing to call somebody a cheat or a fraud.
You are right, I have no idea what the actual tax situation would be in another state. I think it is ridiculous that any tax by the feds or the state would be imposed on changes in value to what was declared to be the only currency in the country. I’d like to see a constitutional amendment preventing any tax on change in value of silver and gold.