I'd certainly never order from a Chinese 0 FB seller!
Before ordering, I would read the entire description and the shipping.
I would use Contact Seller to ask a simple question, usually "do you ship to Canada and how much will it cost?"
Even if there is an answer in the Description and S&H.
Most people are honest, but newbies make mistakes. Lots and lots of mistakes.
Mostly on shipping.
I would also not expect to receive anything but a cancellation and my money back if I bought something at a ridiculously low price due to seller error.
The China thing is because a lot of cheap surface shipped stuff is being held up due to CBSA worries about fentanyl and Canada Post action against China's UPU accounting violations.