Looks like somebody missed the sell-off for the past few weeks.
Ended up getting rid of my pair for $400 (albeit I'm keeping the pads). I think that's the right/fair price for these to be honest. I prefer the AH-D2000 ultimately.
Good luck finding yours!
I own a D2000 with Alpha Pads (which are an excellent upgrade!) and was considering also purchasing the Fostex TH-600 sometime. Could you elaborate on why you prefer the D2000? It appears the TH-600 might have higher resolution in sound (more details).
Specifically, I listen to 85% EDM music, and I'm curious as to which might be better because I have heard the Fostex 600 referred to as EDM king on this very thread.