I bought the Astro A40 Black headset + MixAmp (wired) for just us$130 , I was trying to find it since they came out some time ago but no retailers had them in this poor and stupid country, a dude had a big stock but failed to sell them for Christmas so he wanted to get rid of it (too good Headset for this country market). 
It works fine and it was sealed, no refurbished/preowned shit. It came with a bunch of cables and adapters but to experience the best sound quality I ordered today a TosLink premium cable (the only one that was not included) to hook the MixAmp to the optical out of the monitor.