My current eBay account is the same one I have been using since about 2000, so I don't remember exactly how everything was set up, but I don't remember anything being difficult. Just set up a PayPal account and then select the PayPal option when you are checking out of eBay.
I would recommend BillmeLater, it is an invisible line of credit that I use all the time. It doesn't show up on your credit reports and doesn't effect your util, -and- they offer no interest no payments for 6 months all the time on new purchases. So I buy stuff, don't pay for it till 6 months later, and my FICO stays exactly the same whether I have $0 balance or am maxed out.
