USPS prices have gone up recently for international to $14. I used to offer “large envelope” “untracked or International first class” at $3ish for small items but the USPS has been making it difficult to do that, especially online.
I recently changed some European shipping rates offered to $14 (the USPS rate) for first item and then free shipping for additional items. This hopefully has the effect of encouraging customers to do their own economies by buying a bit more. If they buy a lot more because of this incentive, I just cover the shipping since I have a larger order that covers overheads.
I have looked at UPS and they are much more expensive.