I had almost forgotten about OhMyPrints.com – a very European / Dutch centered print on demand shop for wall art. I had joined and uploaded some artwork a year ago and did not sell anything. Until now!
OhMyPrints is not as big as international companies like Society6 or Redbubble, but they are worth a look. One thing you have to consider though: You can upload texts/titles in English but it is also advised to also add German, French and Dutch. There is no automated translation when uploading. I tend to add German and English. The English version will be displayed in the Netherlands and France as well.
So this is the design I have sold to a hopefully happy customer in Germany, the green grey Santa Monica Pier: