Since Mikr posted first I will let him have priority with any deal, if he stills wants to.
My main interest would be Cold One Knights, though if you don't have those to trade I'm open to most other Dark Elf offers (preferably not Spearmen or a Hydra).
My Nurgle Great Unclean One isn't NIB. He is unpainted, unassembled, and complete (with metal base but no plastic bases). I can take photos if you want. I still need to check if I have the Tzeentch one spare.