I sell on eBay, FaceBook and model forums.
A great deal can become a bad deal. Recently, someone on a model site was looking for a tank kit I had. They probably go for $40, I said I'd sell it for $30 and tossed in photoetch I had for the kit.
He's getting a deal and I'm getting rid of a kit I'll never get to...if the buyer was in the US.
Shipping to Canada is $22 for no insurance and $43 with insurance.
So, now it's $52 or $73 for a kit worth $40 with a $6 PE set. That's not a deal.
Beware of folks who don't list their state or country.
And if they don't want insurance. Once it leaves our borders, it's out of the post offices' hands. If they say they didn't get it, you've lost the kit and the cost of shipping and the money paid.
You'd be better off throwing it in the garbage than sometimes trying to ship overseas. You'd still be out the kit, but you wouldn't have wasted time and money mailing it.