BobTimo, I have seen this model go for as low as $65 on eBay for a unit that had physical damage to the enclosure, but functioning internals. Another which was 3 years old, but described as clean and 100% functioning went for $95. Normal range for the used once or twice, store returns seems to be $100-150 depending on seller and if they claim "refurbished" or are just liquidating stock. If I can help, let me know. I'd be happy to broker a purchase for you and get it to your forwarder. I admire your work and think you should have all the good coffee a person can handle!
mp, grinder upgrade will happen, but I just went from whirly blade to Maestro a few months ago. I have no qualms about re-calibrating the zero point on the Maestro, so I'll get the best I can out of it and maybe ask for a Zassenhaus for Christmas.