The last post in this thread was in 2004 pa but it's a common concern for online buyers. I know of a service that allows you to make PayPal payments on your online purchases. I'm actually an affiliate here, it's PinoyMoneyTalk's PayPal Service. October 2005 pa ito nagsimula at marami na ring na-fulfill na transactions.
Fee: 2% of the amount (minimum fee of $2) per transaction.
Payment is through a deposit to a UnionBank account. If you have a UnionBank Cyber Eon account, you can even make an instant payment online.
Initial requirement is to register for an account at the PinoyMoneyTalk forum
here. Once you have a PMT username, you can fill up the transaction request form
here. This link to the form is my affiliate page. Eventually, the admin plans to offer discounts to clients who use affiliate pages to avail of the service. So I suggest you bookmark the link, lalo na kung madalas gagamitin.
More info
here.