Looking to buy or sell second-hand / used electronic items can be quite risky whether the item may or may not work. As there is most probably no warranty for the item anymore.
One way for Buyers to be confidence in buying electronic items is to ask for at least a 30-days warranty refund from the seller, in case if the item is to be faulty or spoilt in anyway. Ask for all the necessary functions in the items and what problems it may have. If reply does not seems reasonable to the buyer, DO NOT BID for the item as it does not meet you requirement. You may also ask for more picture description from the buyer by email as well in order to have a better understanding.
For Sellers providing trust and promoting confidence and sales to your electronic items is to add a money back guarantee to your items. Maybe a 15-30 days refund on the item cost if the item is to breakdown within the timeline, but keep in mind that the buyer has to pay for the postage as nobody wanted to make a loss.
In any case, both buyer and seller have to communicate with each other before making the commitment to buy or sell.
Same goes for any other used items, but mainly electronics, because they can look good on the outside but spoilt on the inside.