DeepL Pro is not selling outside the EU. If you are a resident outside EU and you want to purchase DeepL Pro, you can purchase a GT4T DeepL Pro plan instead. GT4T offers build-in DeepL Pro access that allows you to use DeepL Pro without having to purchase a subscription from DeepL.
You know what, you will actually end up saving money as GT4T offers very flexible plans. The time-based plans have NO usage limit and the character plans do not have monthly minimum fees or even time limit. You pay only for what you use.