Seeing that you would buy from eBay means you already have PayPal. Many of us already accept that as a payment method anyways, so there's little need to go through eBay as well. If you wanted to go through eBay because you fear of being ripped and wanted to file a complaint through eBay if such an event were to occur, be aware that eBay owns PayPal and ever since their Fall 2008 upgrade, all disputes on eBay go through PayPal anyways. You are also able to file disputes with your PayPal account directly as well.