Used Corsair K70 RGB MK.2 Keyboard

The keyboard is in very poor condition—has been like this for five years. I can barely type on it anymore; the issue is clearly with the switches themselves. I bought it for 700–800 [currency unspecified] back then. Of course, no normal person would buy it now, unless perhaps someone experienced with switches who could send it back to the manufacturer for repair? Not sure. Anyone interested, please offer your price.