If you make it €500, it’s yours 
Here’s the topic when I had tried to sold it, 3 years ago: Mad4One Flik Flok hub. I did not try to sell it hard, thus the reason why I still have it here 
The reason why I have switched to a Pipifax hub is because I really liked the instant engagement. I found it really amazing for my riding style - i.e., trying to coast as much as I can. Also, for uni-packing, the Pipifax is really amazing - if you don’t break it, that is. So, you absolutely don’t want to do drops on it. I broke my first one when riding a bit of trials in the middle of the mountain. My second Pipifax broke when riding uphill my 36er on a ~10% gravel path 
Also, I really like having a hub which does not do any sound: enjoying the nature without “ant CLIK CLIK CLIK”.