As soon as youve registered, you need to become aware of three invaluable tools offered by eBay. These are: user feedback, the Security Center and bidding histories.User feedback allows users to comment on all transaction they participate in. When commenting, the user assigns a positive, neutral or negative ranking to his description. By looking at the user feedback, a users reliability can be determined easily by his rankings, with a high positive ranking meaning that the user received a large number of positive comments. This feedback can indicate if a seller sells quality merchandise, if a seller is recommended by others and if a buyer submits his payment quickly.Security Center is eBays comprehensive safety resource and protective arm. Its basically a service that allows eBay to monitor its users. Whenever users log into the system, eBays servers record their Internet addresses. Although users cannot view this information, SafeHarbor personnel will respond to complaints by users and will determine whether, for instance, an eBay user is using multiple user names in order to manipulate auction prices. So it prevents you from registering 15 times with 15 different email addresses. If one is allowed to do that, he could bump up an auction price to get people to pay more.

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