But for whatever reason, a lot of US sellers have an aversion to int’l shipping.

Int’l shipping was a boon for business when I was actively selling.

For good reason. You could point to domestic USPS tracking information as proof of delivery (which occasionally worked in your favor) during PayPal disputes.

For international shipments, the tracking is lost as soon as the item crosses the border. Whether the item was delivered or not cannot be contested by the seller, who then has to pay out on 100% of claims brought against them.

That's variable and (often) not the case for shipments to Canada. USPS International First Class would yield a tracking number that has delivery confirmation to the destination.

https://community.ebay.ca/t5/Buyer-Central/Does-USPS-First-C...

> Electronic USPS Delivery Confirmation International service — abbreviated E-USPS DELCON INTL — is a tracking service available at no charge for First-Class Package International Service items to select destination countries (see 252.22)

Those ~50 countries listed here: https://pe.usps.com/text/imm/immc2_022.htm#ep2686878

(This was for video games that would cost me like $1 to ship).

Airbnb does take a cut of them though, so it's unlikely they'll lead the push to punish the practice like eBay did.