The value of an "error" coin

What do you think should be the value of this coin with “error”?

Moreover, will anyone be happy to add it to their collection?

I am not interested in error coins, but I would like to learn their “true” value

https://it.wallapop.com/item/moneda-2-euros-francia-2000-1245801284

What error? If an error isn‘t obvious, and doesn’t make the coin more interesting, then it is just bs. I see nothing obvious here, so it might be a minor irrelevant error which I can’t see or someone talking rubbish.

The true value is 2€ exchangeable for goods and services throughout the €uro currency zone.

The seller doesn't claim it's an error coin. 

I need to re-adjust my valuation of mine then, yes yes yes i am 1600€ richer than I was an hour ago. 
 

Going slightly to a different post, but on the same topic; https://en.numista.com/forum/topic174791.html , I currently have a few 2€ coins for sale on eBay, ending soon. They are currently below their worth, I started them at 1€, I am hoping to make a few cents on each coin, they are all 2€ commemorative coins - not standard circulating. I also put one coin on at 399€ (I feel wrong doing it, and if anyone actually buys it, I will refund them ASAP), I don’t think it will sell as so far it has the second lowest traffic behind some CDs and a DVD which has none!

I will post the results in the linked thread above in a few days.