A broken OnePlus 6 128GB will sell for less than a working one, and even less than a brand new one - obviously - but nonetheless, they’ll sell. Just make sure you’re honest about your gadget's condition and you’ll get the most accurate quotes. If a recycler receives your device but decides it is not in the condition they expected, they’ll send you a revised quote by email, which you can choose to accept or reject. Some will charge postage if you want your gadget back, though others will do it for free.