Just a heads up about Paypal again.
The refund policy DOES NOT cover you for motors or items that are not usually sent via post. Read and play by the rules you are 100% safe , dont and you will lose money at some point.
From ebay:
The programme is designed to protect purchases that are usually sent by post – over 99% of listings on eBay. It doesn't include vehicles, real estate, businesses for sale, digital goods or services.
eBay UK : How to use the Resolution Centre