That ePaper watch looks really interesting! I should add though that Espruino on some other watche is not Bangle.js - you won't be able to run many (or sometimes any) of the apps from https://banglejs.com/apps/ on them. It can still be fun if what you really want to do is develop your own apps from scratch though.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
There are new Bangles available to buy in Europe, for example from Berrybase (https://www.berrybase.de/detail/index/sArticle/9697/sCategory/2478) but you're looking at around 90 euros.
That ePaper watch looks really interesting! I should add though that Espruino on some other watche is not Bangle.js - you won't be able to run many (or sometimes any) of the apps from https://banglejs.com/apps/ on them. It can still be fun if what you really want to do is develop your own apps from scratch though.