Logitech Stereo Headset +

I would like to sell a Logitech Stereo Headset in dark grey with only one month of use. I have changed computer (the headset became useless for me since there is single jack for both headphone and microphone) but the last time I used it the sound was very good. It has analogue connection and, as far as I read, it works better with Microsoft products. You can find more information here: http://www.logitech.com/en-gb/webcam-communications/internet-headsets-phones/stereo-headset-h250 I do not have the box anymore but I do have the instructions.