I would say possible IF your primary address is a US one. Dont try to register a US pp account with UK address - you will be directed to .uk.co website right away.
For eB, you can list on any platform - .com, .ca., .de, etc. - regardless of your primary account address - you just have to be registered on one platform.
I thought the registered country dropdown menu was only at the beginning, when you make the account...
how do you go about changing it afterwards? by contacting support?
Just change your main address. The country box will be there, and once you try to save the changes you will get a message "congratulating" you on your move to the new country. They then ask you to confirm that you want to change your country, and when you do that you are done.
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