Kann die Volksbank dir den Wert von einer Münze sagen??

No

of course it depends on what a coin.

Other

Valid payment method

or collector coin, numismatics

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The banks buy precious metals, but there’s no idea in the branch. They send them in and then you get a price. (slaughter than in specialist trade)

Valid means of payment: foreign currencies are only purchased if they are notes. Coins are only worth something in the output lance.

And collector’s items: there are forums, collector’s exchanges… here too, experts can find themselves. Just give me two Euro pieces. They’re worth 2 euros.