For the first time buyer, Ebay can seem a bit confusing but with this 5min guide you'll bne on your way to being an Ebay pro.
Firstly you need to determine what it is you are wanting to buy. An example would be sunglasses. Type in the search column your desired item and then go to the drop down box next to it so see what category you need. This will help narrow down the search. Clink go and you should come up with a screen with items. At the top it may also have the option to narrow down your search. Depending on whether it relates to you item can mean it may be useful. If not search then bid and pay if you win.