This guide should help people new to Ebay. It should teach you how to use the Buy It Now feature.
Buy It Now is available as a type of listing or an add-on for an auction.
It is used to buy an item for a fixed price.
When buying with buy it now you need to click the buy it now button. It charges you for the amount displayed on screen, next to the buy it now button. There are also other options (like buy it now but with an auction feature. If there is a bid placed, the buy it now disappears)
The proceedings continue as that of an auction (with the respects of payment) and you have won the item.