No one has more insider knowledge about Black Friday than the sales associates working that day.To unearth 11 lesser-known facts about Black Friday, Business Insider surveyed more than 40 Black Friday workers.Whether you want to know what's a terrible deal or how to not get duped, read on for the inside scoop:SEE ALSO:14 things Black Friday workers wish shoppers would stop doingDON'T MISS:Black Friday workers confess 9 things they'd love to tell shoppers but can'tThe mall doesn't open until its 'anchor stores' do"Anchor stores such as Macy's, Nordstrom, and Target make the decision for the entire mall. The mall opens when they open, and those that don't comply are fined by the mall for every hour they stay closed. Some stores like Apple acknowledge this and happily pay those fines."Black Friday sales are usually on older models and are often the same deal as last year"Most of the bigger deals are actually outdated products. Yeah, you have your new tablets and phones, but those will be very limited in both how many there are and how much you can save. Most of the biggest and most tempting savings come from products that are at least a year old or more and they have to clear out the inventory in the warehouses."According to a study from NerdWallet, 93% of stores offered customers at least one product for the exact same price in 2014 as in their 2013 Black Friday ad.These products would probably have gone on sale anyway"New product lines come out a couple weeks after Black Friday, so those older items that are on sale on Black Friday would go on sale anyway."See the rest of the story at Business Insider Click here to read full news..