I paid 2800,- for an M12 and sold it by 5000,- around 10 years later, because I was worried about the components getting old. In any case, I was sure that prices would still continue rising although not this much. It is interesting to see what will be the peak 10 years from now. 5000,- for an Xpander today feels not too much in comparison. Quite the contrary, as PeWe pointed out!?