About the "physicality" of the sound.
A French just bought a used Abyss at an U.S man. This is an Abyss who apparently served only two hours. The reason for the sale? This American prefers apparently upgrade its speakers. Maybe this headphone was not enough "physical" for his taste for replace the speakers?
You left out the fact that his wife purchased it for him as a gift, probably in the hopes he would not buy larger loudspeakers.
Sincerely, you believe, you, to the story of a guy who receives as a gift from his wife a headphone of 6.000 dollars, without asking the opinion of her husband prior to a purchase of this magnitude, in the secret hope that it will not buy a larger speaker system.
Then, 2 hours after having tried this headphone, the same guy, apparently tight-fisted, hastens to sell (at a loss) the gift of his wife to satisfy his selfish desires?
Personally, I don't ever allow me to resell a gift from my wife, especially at this price.
PS: she must love him a lot...