eBay

Why is eBay international shipping so expensive? I sold a $5 book and it cost $20 to ship to Canada from US, while I also just bought a book from the UK and shipping was just over $6. What am I doing wrong to make it cost so much for my buyers, plus ...

I've sold an item and when I download the shipping QR code and try to open it I keep getting an error message that the file is corrupted. I also can't find the option to have it emailed to me.