Several auction websites don't confirm if an merchandise being sold is authentic or is properly characterized. These kinds of offers are usually deemed according to the discretion of the buyer because the auction site can not guarantee the genuineness of a particular product. Small local computer shows are known for providing shoppers the best discount offers.  You only have to be wary whenever you shop there and you need to know how to distinguish the authentic products out of the counterfeit ones.  Moreover, vendors there usually charge in cash basis only.