I am selling a V-MODA BoomPro mic that I modded to fit my late SoundMAGIC HP200. It can fit the other SoundMAGIC full size headphones, like the HP100 and HP150. All I did was melt down some of the plastic on the connector part (see picture) so it can fit, everything works and sounds just fine. It will include a y-splitter adaptor.
If you are a gamer, and own one of these headphones, it will transform it into a great headset. It can also still be used with headphones that have a 3.5mm entry.
Price includes PayPal fees and shipping within the US 48.