(Full disclosure: I'm the GB runner for
the upcoming GMK Red Alert run, March 5th to April 9th. Running it for reasons stated by pixel - the set is
never publicly available. As pixel said, I'm using a different stock GMK red for my run.)
Whoa, this is a classic! You can even see the blank concave 1u mods at the bottom. The set
might be a bit steeply priced, but this lot is most interesting for the historical "JOKER" and Hammer novelties. My understanding is that those are two of the first novelties ever offered with a custom keyset.
So $299
could be reasonable, although if honestly you're not interested in the associated history I do recommend waiting for my set.