It could also be €9,99 on amazon.fr when it comes back in stock. A few days ago, there were three listings wth no information/pics, but I put an order in and now it looks like this

:
Just waiting early March to cancel the one that isn't real and the one that looks like a purple DVD steelbook. It's weird that they're doing that, and weirder that everything is €10 - but other Sony steelbooks such as
The Equalizer and
Fury were €14,99 for the pre-order period so they were also cheaper than regular new steelbooks).
Now they're unavailable, but soon enough, maybe they'll return to €10

.