I know this may not be a useful point, but just wanted to note that paying the equivalent of €380 here in the US would be an absolutely crazy price for a used edition of one of those. I'd expect those to go for the equivalent of 65-70 euros at the low end, around 100 fully loaded with the most useful parts. Even with international shipping, I'd think you could do drastically better.
From personal experience though, I run 4 of the Lenovo Tinys in my lab currently. I can highly recommend the M700/M900 line, M920 if you can get it, but the M70Q is fine.