This is all well and good, but how many have been produced?
If Grado got a few thousand GH-1 out of that three, the limited edition satus doesn't add much to their value.
I mean, if you think about it, even the production of regular models eventually comes to an end.
For example, I don't know how many were made, but the classic RS1's production has stopped in 2008. I was willing to pay good money for a pair of n.o.s. RS1, even if it never had a limited edition status.
If the GH-1 would've been sold out within a few days, or weeks, we can assume that the demand would've far exeeded the supply, but it's been a while now, and they're still available,
so in my opinion, as great as they sound, the GH-1's limited edition status is pretty weak.