Cannot buy from Germany on Steam.

Please remove the last line.

Try using the country code of Slovakia.

Send a ticket to Steam support saying you recently moved to another country. As you changed from Eu2 to Eu1 prices have also changed I guess, and Steam detects that you are in a different place than the one your profile shows

If you still have trouble buying those games, i could help you out. As long as i get the full amount of money for it of course. Add me in steam if you want.

Ask a slovakian friend of yours to make the purchase ? Or, give your codes to a trusted (I mean, really really trusted) friend or family member who lives in slovakia so that he buys it for you.

You should have contacted Steam Support before going on holiday, so they can remove the lock on your account.

You should use this steam website. This is what I do when I am travelling (I change the last two letters to ca for canada)

http://store.steampowered.com/?cc=sk