Not much to break on a module, the GEM stuff are built like a tank, I have my WK8 for over 10 years, and nothing has happened every button works perfectly were as a KORG, forget about it, I don't want to get into it, if the module is a few hundred euro's buy it, get the person that is selling it to send you some audio mp3 demo's, this is my opinion although mdorantes does make some very good points in also haggling a bargain, I think I have a friend that has one of these if you can't find anything on it maybe I can ask him to send you something?

Good Luck! in whatever you decide.