If retailers' doorbuster deals are giving you a sense of deja vu this holiday shopping season, it may not be all in your head.
New analysis by NerdWallet, which examined Black Friday advertisements from 21 retailers, found all but one of these companies listed at least one product for the same price as it did in its 2014 ad.
What's more, the financial education site said several retailers this month have already offered the same or lower prices as their Black Friday deals.
"This is the fourth year we've conducted this analysis, and we're still seeing repetitive deals every year," said NerdWallet shopping manager Katrina Chan. "Just because a retailer promotes a certain product as a 'deal,' consumers shouldn't take that at face value. Shoppers still have to do their homework early."
NerdWallet listed Belk as the biggest offender for repeat deals, saying it duplicated at least 80 in this year's Black Friday ad. Macy's came in second, with more than 60 repeated deals. Only Dell did not advertise any of the same deals, according to NerdWallet.
NerdWallet's findings follow similar results from WalletHub, which said Monday that 11 percent of the Black Friday deals from 17 major retailers have been recycled from last year.
Both announcements come as shoppers have become increasingly skeptical of Black Friday deals, as promotions proliferate the shopping scene year round.