Once again the vendors/FFLs seem to be going beyond what the law actually requires. Even in California, purchases from private parties are not subject to sales tax at point of purchase. CA residents are required to pay "use tax" on these purchases, but that is done as part of the annual state income tax filing. eBay has been charging sales tax for years on purchases from private parties, even though they are not required to do so. Easier for them, not necessarily good for us. Screwed again.