Cross-border price differences have been a major point of public debate in Austria recently. Particularly supermarket prices are often up to 50% more expensive for the same item than in neighboring countries, even if the product has been produced in Austria by an Austrian company.
This shows that the EU still has a long way to sufficiently integrate its markets, despite free movement of goods having been established ages ago. Projects like this may help facilitate the transition to a more unified market.
The first thing I do for all of my projects is adding a .npmrc with save-exact=true