How to make sure Amazon doesn’t rip you off on Black Friday

More shoppers than ever now spend their Black Fridays at home on their computers or smartphones rather than at stores in endless lines or crowded aisles.  

That can save a lot of public headache, but it can also make it harder to tell how much money is being saved. Sites can adjust their prices in the moment based on location, time, and customer attributes. Algorithms, rather than store displays, typically determine what products you see.

In that environment, price-tracking firms like Wikibuy and Camelcamelcamel aim to offer more perspective. They compare discount deals with data on how much a given product has sold for on the same site in past months and how that stacks up against competitors. Read more…

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