| 摘要 |
Product attribute comparison after a product is purchased is provided. In an embodiment, relevant product attribute(s) (e.g., product purchase price) are received from a purchase receipt, which are compared against the current value of the attribute offered by the seller, wherein if a desirable attribute change has occurred (e.g., the price for the same or similar product has dropped) the buyer is alerted. Some embodiments further automatically effecting a refund to the buyer when the desirable attribute change was detected.
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