I buy things on e-bay regularly.. (Using Sampath Web card
You can link the web-card in the PAYPAL account. Then, they will ask for a security code which will appear in statement.(To link the card, there should be a balance of at least Rs. 1000 - 2500 should be available)
Then you can call the sampath card centre and ask for the code by providing your identification details.
Once you enter the security code, paypal will register the card under your name. Then you can pay for stuff bought in e-bay.
Unlike in a normal credit card, you should make sure that the amount is available in your web-card since it's a pre-paid one.
Web-card is the safest way to do transactions online !
Hope this helps....!!!