Like the title says, I'm thinking of letting my full sized HP combo go. I recently acquired a set of iems that do better justice to my favorite Justin Bieber songs(that, and iems are more convenient at this point in my life), so my HD600 and Asgard are sitting on my desk more as decoration.
I'm really in no rush to sell, but I might let it go for a reasonable offer. Both are nearly spotless.
Since it's my only headphone, I can send the omega style headphone along too for free.