Logitech A10 headset, the microphone is broken

Logitech A10 headset works perfectly, with strong and clear sound, but its microphone is broken. You can use it with your mobile, Sony device, or PS, though no one will hear you if you speak into it. I've had the headset for less than two months; it's still new, comes with its original box and all cables. Selling for 80, negotiable.