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DENVER — Black Friday is steeped in tradition. It’s as American as apple pie. Especially if it’s on sale.

“Black Friday started as the kickoff to the holiday shopping season and it’s really evolved over the course of the years,” said Regina Conway, a consumer expert with Slickdeals.net.

It’s the day of days for retailers. Some bargains are legitimate, but experts say watch out for what they call “derivative products.”

“A derivative product is something that’s discounted basically to make it look like it’s a great discount. But it isn’t something necessarily you can’t find elsewhere at a better deal,” Conway said.

As you’re perusing through all the Black Friday ads, you might experience a little deja vu. That’s because, according to Wallethub.com, more than 11 percent of all deals are the same as last year.

Retail sales are a business. We get it. It’s the American way. It’s also the American way to use our noodle and get the best bang for our buck.