Start tracking prices now. Using an app to explore a product’s price history can help you see through retailers’ marketing tactics.

Black Friday sales are everywhere. Judging by retailers’ advertisements stuffed with language like “must-have deals” and “can’t-miss epic finds,” you’d be led to believe that every deal is too good to pass up.

But what actually makes a Black Friday deal worth pursuing? An item’s reduced price, availability and affordability are key elements.

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This column was provided to the Associated Press by the personal

finance website NerdWallet. Lauren Schwahn is a writer at NerdWallet.

Email: lschwahn@nerdwallet.com. Twitter: @lauren_schwahn.