How I buy premium without credit card?

[SuperStar Faith]

https://www.paypal.com/webapps/mpp/make-online-payments

I saw this site, but I can't see what is the email of second life.

I already bought lindens but with cards that I buy on stores

[Lindal Kidd]

You can sign up for PayPal on the site you found.  Then "verify" your PayPal account by following the instructions on their site to link your bank account or a major credit card (NOT a prepaid card) with your PayPal account.  Then use your verified PayPal account as your Second Life payment method.  You don't need their email address for that.

You can also buy $L from one of the authorized $L resellers, then exchange your $L for $USD, and use that to pay for your Premium fees.