Tariff for used item from Canada to US


I bought a used Auralic streamer from Canadian Audiomart, got a UPS email holding the item and demanding $450 tariff. I emailed the seller, an audio shop in Canada if I could have it returned, and they said no. I paid through PayPal. The shop did mentioned it MIGHT got tariffed since its a Chinese made item. Is it fare that they refuse to take back? What would you do if you re in my shoes? The $450 tariff will make it as expensive as new in US.
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Thanks for your opinions. Others be careful buying from foreign countries  in the future.
Cheers
I believe the tariff could be exclusive to equipment of Chinese manufacture due to the previous U.S. administrations trade war policies.


I bought a streamer from Hong Kong last year and it was held until I paid a tariff.
Yes, I believe so. My sister works import export for UPS and yeah a lot of things originating in China gets what they call the  T tax .