I only bought a single Gamebuino during the Indiegogo campaign, and now wish I'd bought two so I could have a go at multiplayer and include my girlfriend (she's not a coder but likes playing easy games with me, and everything I own on Steam is way too difficult for her!)
I look forward to a new shop if/when you decide to set one up - particularly if you will be able to manufacture more devices!
Or maybe I should just get an Arduino board and attempt to piece together a Fakebuino