Sold https://www.ebay.ca/itm/276399503918 from Canada to USA. Who pays sales tax?

EBay charged my buyer for sales tax and announced to charge me too for PST/HST. IMHO selling and exporting to USA is free from Canadian sales tax. Please clarify

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The HS tariff code is 8523.80 (phonoghraph record). Canada and USA are NAFTA. Accordingly the seller is exempt from taxation in Canada, since the article is exported and the buyer pays sales and import taxes.. The buyer

 

Yes. The buyer pays applicable duty and sales taxes for their purchase.

But the seller pays Canadian tax on their own fees which is the "service " part of Goods and Services Tax. Provincial taxes are all over the place on what is a "service".