Pixelhead - the ultimate in anonymous?
thelocal.de
thelocal.de
He sells them for 158 euro.
It's also worth looking at CV Dazzle if you find this interesting. It looks at ways to beat current face detection mechanisms while not looking like that's your only intention: http://cvdazzle.com/
A Pixel-style print of the German Secretary of the Interior Hans-Peter Friedrich
So it's a bit of inside joke as well