Tax on internet sales?

Yikes, that "white box" post sales call was so common in the old car audio game...buying gray market Alpines or Sherwoods that had a REFURBISHED sticker right on the bottom and NO warranty support from either company..."
Where did you buy it?" Joe's auto stereo..."Sorry they are not an authorized reseller, your warranty claim will be denied" and of course Joe's wont fix it..."Take it to Sherwood up the freeway, its their product!"... F you.