So you don't want to give away your card details? No problem!
NOTE: What I'm about to explain is all on Pro-jump.co.uk, NOT Ebay, or other online stores.
When you have chosen what you want, do the shipping zone, add to cart, and the things like that, then on the page where you tell them your details, tell them! Then on the payment method section, it says 'Pay by card'. Next to it is a little arrow, if you click that, a few more methods appear. (Some of the mehods are just like 'Mastercard', 'Visa' etc) Such as 'Postal order', 'Pay by phone' etc.
Then click what method your happy to do!
I hope I've been a bit of assistance there!