These have hit an all time low according to PriceSpy at $148. Neil previously posted them at their previous low of $188 here also some good info and reviews there. You can get another $5 off to make it $143 by signing up to their newsletter, details here. The i30 model is also available for $128 or $123 after newsletter sign up (also an all time low).
The i60 are currently $549 at Mighty Ape or about $420 Shipped at Amazon
Some great reviews for this unit, certainly the time to grab one if you are looking for a headset.