A product sales system utilizing the product purchase history, product of interest, and customer review of an acquaintance, the product sales system includes: a former purchaser terminal configured to receive a customer review for a purchased product from a former purchaser and to register the customer review with a product sales server; a prospective purchaser terminal configured to connect with the product sales server, to select a product to be purchased, to receive an acquaintance customer review from the product sales server, and to display the acquaintance customer review; and the product sales server configured to register and store the customer review, to determine information about an acquaintance of the prospective purchaser who desires to purchase the selected product to be purchased, to extract an acquaintance customer review and to transmit the acquaintance customer review to the prospective purchaser terminal.
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