Sorry, but I can't speak your Lenguage.
I'm from Spain.
Here.. We have 12 euros conmemorative silber coins.
From 2002 to 2010... 12 euros/ silber 925. 18 grams.
From 2011... 20 euros/silber 925. 18 grams.
Obviously...It's more interesting de 12 euros...
It costs about 12 euros and the silber on it it's 13'50 euros worth.
There are many to change here on BDE (office of bank of spain, on each province of Spain like Madrid,Barcelone,Valence...)
About 1.000.000 each year. more than 8.000.000 and anybody like these.
Here there not silber culture like in Germany and these coins you can change maxium 83 coins/each person a day.