In Germany, selling goods for less then the one bought them for can be illegal if its used to push competition out on a large scale.

That would most likely be illegal in Finland. You're not allowed predatory pricing. And the same is true for the EU as a whole, although you may have to be operating in an international market, not just a local one. See Abuse of dominance in: https://en.wikipedia.org/wiki/Article_102_of_the_Treaty_on_t...

The US, the Sherman Antitrust Act prohibits predatory pricing.