Hm, my local hardware store sells UTP CAT6 for €1,60/meter
And my local Action sells 10 meter pre-made FTP CAT6 cables for €3 each (which I could just cut up into €0,30/meter cable)
(Starbucks is finally leaving the University of Twente, where it was almost unanimously hated by students for being in the way of student workplaces, being loud and obnoxious, and way too expensive. Oh, and they didn't pay any rent because the uni wanted them here so badly)