I can get 200 euros for my hd600 (they cost 279 new), 150 for the m2 and 100 for the m1 (both wired, both over ear). The hd700 i AM pretty sure it will br discontinued since it was not very sucessfull and the hd660 kind of replaces it. Maybe they will keep the hd600 and as cheaper alternatives in the hd6*0 line, kind of like beyer with the dt770 and the dt1770 and etc... Who knows.... But the beyers havê a big price gap between them. These new hd660 dont cost much more the hd600 and 650, unless of course they plano to drop the price on these 2.