[PFNog]

You represented it as a usable core. That’s what the buyer was paying for. You did not deliver what you represented. Bottom line - you should refund the full purchase price and shipping- up to you if you want to pay to get it shipped back. You took a gamble in hopes of profit and it didn’t pay off. Take your lumps and do the right thing by the seller and you can hope to profit on another item in the future… otherwise who will trust you. This is about your reputation and your word- what’s it worth?