Two consumers allege that Amazon misled customers by promoting false discounts on its site during its summer Prime Day sale.

In a proposed class-action lawsuit filed in September in a federal court in Washington state, plaintiffs Cathy Armstrong of California and Oluwa Fosudo of Maryland claim that Amazon used "fictional" list prices to calculate its recent Prime Day percentage discounts, making deals appear better than they actually were.

The lawsuit details a number of examples of what plaintiffs alleged were "fake sales" during the four-day Prime Day event, which ran July 8-11.

One such example is a pair of headphones advertised by Amazon on Prime Day as being on sale for 44% off the product's list price of $179.95, according to the complaint. Plaintiffs claim that the item's list pr

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