What they should include is - -What was the previous price -Over what period of time was the item on, at that previous -What stores/shops were the previous item on at the previous price
That website seems to have used the 'Black Friday' tag simply to bring together any current offers, since the links don't actually seem to relate to specific Black Friday promotions at all.
-What was the previous price
-Over what period of time was the item on, at that previous
-What stores/shops were the previous item on at the previous price
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