I'm new to this, but if I read the update correctly, the key sets should ship out around November. That would probably be the best time to be looking in the aftermarket for this set?
If you can take the risk, the best time is now, just leave a message here (as you did) - and to the massdrop discussions - you can make the keycaps ship to you
How would this process work? I contacted Mass Drop directly and they told me they can't transfer sets to someone else, their system does not allow it.
It doesn't work well honestly - but it doesn't work well in any case, Massdrop just refuses to give support if you bought the set from someone else, or uses it as an excuse to stall or halt support, so in any case, If you didn't buy directly, beware of this fact (Even if you buy directly, the support is questionably just, but let's just bygones be bygones)
Anyway, how the process works:
You buy the set from someone, pay them with paypal, they contact Massdrop, change the address for the set, then when the set launches, you wish the address change is still effective
If they end up sending the set to the previous address (I've read this happening to people who genuinely move from one place to the other too ...) - you either wish the buyer re-send you the set, or open a Paypal dispute
Even if the seller is a decent person, s/he might want to keep the set when the above happens, and seeing the GMK Carbon, s/he will do this 90% - and you likely being a decent person, will allow the him/her to keep it - so again, beware
So, all in all, it's risky, but in the past, it was much easier than tracking a set that people are buying and searching like crazy