ebay

In ebay you can shop online and sell things online

Definition: eBay.com is an online eCommerce auction site that allows individual sellers to place items up for bid or purchase. Interested buyers can place bids on these items or opt to purchase them instantly for a flat fee.

Advantages : you can get whatever you want just by one click and its easy to get ,plus you can sell anything you want with any price you want!!

Disadvantages: the people who sell things like PSP for e.g can lie to you and send you the real PSP box and when you open the box you find an old Game Boy