So. My trip to the local hobby shop wasn't that successful.
All they had were
these and some kind of pigment ink I forget the name of. From reading what they were for it seemed to me that they're not that great for what I have in mind. I won't mention the price, too. My next try will be tomorrow in Trier (Germany), if the results are similar, I suppose I have to do online shopping, eh.
What I want to stamp is cardstock, and from Heather wrote I understood I need dye inks for that. Correct me if I'm wrong. :-)