User Activity

I get why we pay seller fess on item price and shipping charged but shouldn't the sales tax, something between ebay and the state the buyer comes from be paid by eBay? It's independant to the sellers transaction. a minimalist example:
eBay has again changed their Terms of Service and they auto-enrolled everyone into the AI Development and Training. To Opt-Out turn off the toggle in:My eBay > Account > AI Training Preferences
How are we handling antique or old items from China? Are they handled the same? i.e. A 150 year old piece of Chinese porcelain? I mean, it's ridiculous to apply tarrif's on this is it not? (Not that ridiculous isn't the l'orange stupide's middle name...
We experienced a once in 20 year mix-up when sending a package to a buyer over the holidays. They were helped us make sure everything was sorted out (a package was sent to them that should have gone to another buyer, and they posted it along for us)....