eBay buyer protection is amazing. If you’re buying on eBay do yourself a favor and go find their policy document that describes the requirements for each level of condition that an item can be listed for sale under.
Sellers are often lazy (or scammy) and list items with greater damage than allowed for a given listing condition and think that writing things like “sold as is, no refunds!” in the body of the listing is some kind of get out of liability free move when listing an item as “Used” or “Refurbished .”
Unless you’re buying an item that’s specifically listed under “for parts or repair” the item must be 100% working with no loss of functionality when you receive it, otherwise you can just open a case and send it back for a 100% refund including shipping. This is a great way to hold a scammy seller over a barrel for a fair partial refund for any missing functionality. Remember that any time you have to send an item back the seller has to eat the cost of shipping both ways plus any fees eBay charges them, so feel free to extort fair compensation if you’re willing to keep the damaged item. If you can’t get an amount that would allow you to repair the item back to full function you can just say no to any offer and send the item right back. I’ve shut down dozens of sellers trying to move damaged items this way, all you have to do is point to the policy document and eBay will back you up.