At least in Europe they have a huge choice, buying and selling to each other. Same for so many goods, as the European climates are very varied- so again, can buy fruit and veg, etc, which need very specific climate conditions to grow. Same for wine, cheeses, etc, etc, etc. They will never be short of choice even if they just stick to each other. And no borders, thanks to Schengen, easy, peasy.
QUORDLE, 12 March ๐ง๐ง๐ง๐ง๐ง