Personally I think that having such a machine would be nice in general
(i.e. FOSDEM, etc.) and that we could simply buy it for the GNOME event
box.
This looks identical to the one we had:
https://www.amazon.de/Buttonmaschine-Typ900- Starterpaket-Buttons- Buttonpapier/dp/B001PACPCA/ ref=pd_sbs_201_2?_encoding= UTF8&psc=1&refRID= CWKW0J0QFMGA1R4JEKX3