Only per cent of Black Friday deals are really worth.
The reason why discounts may look bigger on Black Friday is .
The price of the Dyson vacuum cleaner was in August compared to Black Friday.
In order to tell apart bargains from worthless items, you should in advance.
camelcamelcamel.com helps you over time.
If the price of an item was lower in the past, it is likely to that price after Black Friday.