I bought a new coin. That's 0.5 oz, and worth 20 €.
This is a bit more expensive than silver. In my opinion, this coin is not well done, is too much small details. Coin has many smal drawings. Alexander von Humboldt was a great scientist, he has a great legacy. But do not put too much in a little coins. Now I'll wait, this week will come out a new german coin, I shuld be fast.