All hail the Prince of Darkness!

I have available a Rosson Audio RAD-0. This unit is special for a few reasons:
1) This is the dark-tuned version. For those who don't know, if you purchase a custom unit straight from Rosson, in addition to the normal tuning, you can also request a darker or brighter tuning. A dark-tuned version has only ever come up for sale once, and recently (I watched the market for a long time before caving and buying straight from Rosson... should have waited though), so it is pretty rare. The color scheme looks a little like space and is also dark, to match the sound. I can send more pictures upon request.
2) This unit is #420 baby! I don't partake, but this still amuses me.
3) This unit comes with the aftermarket headband featured on TylersEclectic, which improves comfort (this is also the same tuning as his RAD-0, which is his favorite headphone alongside the Atrium).
4) This unit also comes with AffinityAdapters so you can use your high-end Audeze/ZMF/Meze cables with this headphone.

RAD-0 has a special place in my heart. My first high end headphone experience was a Focal Utopia. I thought I would love it, but I hated it. Way to aggressive. Then I tried RAD-0, which I adored. That was when I first joined Head-Fi. I have owned RAD-0 now 3 times over the years.
What impressed me with the RAD-0, especially at recent CanJam SoCal, was how solid and present sounds seemed to be. Cymbal hits are not some ethereal thing floating off in the distance, they are very solid and palpable, almost as if you can grab them, and not splashy at all. RAD-0 also worked well with DAPs and especially the Enleum.
I am a lover of "darkness and mystery" in headphones. I loved the original RAD-0, but I have noticed some revisioning over the years. I preferred the warm, smooth, lush, and impactful sound of the original batch compared to the recent batch which has a more neutral Hifiman-esque tuning in my opinion, so I requested the dark tuning. I think RAD-0 is named appropriately, it is RAD sounding headphone, one you can get lost in. I think it is good for vocals and metal (Fear Innoculum for example) especially. Also atmospheric stuff. One thing the Rosson can do that the 1266 cannot do is be gentle when called for. I think Chord and a GS-X Mini or Enleum is perhaps the perfect pairing for it. It pairs better imo with more neutral gear, and not so well with warm gear (such as Holo Spring or Nautilus) being that it is already on the warm side of neutral. Due to its weight and clamp force, it is not the best for casual usage like working and gaming (although the boss theme form Neir Automata sounds great), and also not the best fit for my system, which is already pretty warm.
All in all I have only put a few hours on this headphone. A shame really, but this is my third time owning RAD-0, so I have heard it plenty before.
This comes with all original packaging, carrying case, and 1/4" cable.

Asking price includes insured shipping and Paypal fee. Unfortunately I will be taking a pretty huge loss on this one. I am primarily hoping for cash but open to trade offers (perhaps a Stealth, Expanse, or speaker amp) and best offers.

Thanks for reading.