You can't do this through Ebay.
I have found the easiest way is to give the buyer my bank details (sort code and account number) and be paid via bank transfer.
If you both have Paypal, you can ask them to pay you via Paypal.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)