Hello all,
Just chiming in about my recent Fidelio X1 purchase. I bought them "Used - Like New" from Amazon Warehousedeals. You can get them in various degrees of condition including: Used - Good ($171), Used - Very Good ($177), and Used - Like New ($180).
Anyway, the Like New really is as is it described. I couldn't tell the difference from a brand new set. See pics below. The only blemishes I could see was on the box itself. One corner was slightly dented and there was a small 1.5 cm hole on the side. The headphones are in perfect condition. Just thought I'd share my experience since you can save a bit by browsing the Warehousedeals. Prime shipping too!
BTW, I measured the resistance of the cable. 1.8 ohms, so no change there.