You can either pick it up and then inform the seller you now have the item if they can send you enough payment to cover a tracked postage you can post the item back to them.
Or, do you want the item? If you collect it, and it's in good order, again inform the seller, and the right thing to do would be to repay them.
You cannot do it through eBay as that transaction closed with a refund. You'd need to refund them by cheque, bank transafer, or if you have a PayPal account and Friends and Family payment. Or, they can send you a PayPal invoice for the amount, you can then select to pay with various card payment options.
If PayPal is used, email addresses need to be exchanged, make it very, very clear in your eBay messages, as eBay do read these, the reason for these exchanges. Make it clear it's not to be used for an off eBay sale.
@smd1230_0
