It's more than those three. They charge it here in Illinois and they don't even have an office here. They claim any state that they hold an auction in will, permanently, garner a sales tax. They even charge sales tax on the Buyer's premium and the shipping charges. Ridiculous.
Hard for me to bid on any of their auctions because of the high buyers premium and the sales tax and win because I live in Texas ..
Legally, you'd pay either way. Most states have "use tax" laws that require you to pay sales tax directly to your state for out-of-state online purchases where sales tax wasn't charged by the vendor. Texas estimates they lose 2 billion annually by consumers that neglect to pay use tax when they file their state income tax.
By collecting sales taxes in only certain states, it puts the bidder residing in a tax state at a disadvantage. He has to be willing to pay 10 - 12 % more when bidding. If the sales taxes are truly owed, why not collect them on all transactions and level the playing field ? Also, the sales tax on the BP and the shipping is definitely debatable. Say, if I buy a new furnace, they only charge sales tax on the materials. When I get a haircut, all service, they do not charge sales tax at all, etc. etc.