So now I sell the sticker via eBay. It seems people really really like it. The sticker is sold very inexpensive and I have minimal postal charges. Since then I have also created another sticker which says „No advertisements“. It is a sticker for the mail box and is asking the mailmen to not send me any advertisements or free of cost newspapers. This is quite common in Germany but I have created a variety of different stickers and sell them together as a pack. So people can choose their own. On eBay people rate me with the best marks. I always make sure to mail the stickers on the very same day they are ordered and also I respond to every mail from clients very polite.