Although Black Friday is supposed to be the "lowest prices of the year", doesn't mean they always are. Sometimes there are items listed as a "sale" and then in small print say originally just $1 more than the sale price. Here's a great example.
Shopko has 8ct AAA/AA Energizer Max as a DOORBUSTER for $6.99 (Reg. $7.99)
Here's a little fun fact. Everyday at Wal-mart, this same size package of Energizer batteries is only $6.37.
Another scam to keep an eye out for...if a price sounds too good to be true, it probably is. What I mean by this is; if something is a door buster price, you have access to these items enough ahead of time to take a look at the reviews. Walmart has Rival products on sale for $4.50. Well look at this review for the waffle maker. Maybe $4.50 isn't such a great deal.
Keep an eye out for scams like these and many others. This is why it's great to know your price points. I know groceries and household items are two different categories, but you have the power of the Internet at your fingertips. Don't be a victim of a Black Friday scam!!