ebay is the simplest and easiest way of shopping online. Simply go to www.ebay.com.au, in the search bar type in the item your looking for (for example, heavy metal). Then click on the coressponding categories that you wish to search in eg cd's, dvd,s etc. For a general search simply search all categories. ebay will then dispaly your search results and you can sift through choosing, any item that may be of interest to you. Clicking on the hyperlink will take you to that item where you can see further information such as the seller, where the item is located, how to pay for your item, how much shipping for the item will be, and of course the option to place a bid on that item. To place a bid simply click on the place bid tap and enter the ammount you wish to bid (for this you will have to be logged into your ebay account). This will take you to a screen where you can confirm your bid. Then it's just a matter of time before the auction ends, if you are ouytbid on your item but there is still time remaining in the auction ebay will even send you an e-mail letting you know that you still have the option to bid again on the item.
ebay, simple easy and efficent, check em out.