Here's our round-up of what's on offer so far:
Top deals include a Fire HDX 8.9" Display, which is yours (or a loved ones) for £299.99 (38 per cent off), or Sennheiser Momentum 2.0 on ear headphones for £99 (42 per cent off) and a Hisense 50-Inch Smart LED TV for £429.99 (28 per cent off)
At Ebay you can purchase an Action Sport Waterproof HD Camera for £19.99, while a Pineer Apple Car Play can be bought for £279.99. And for those a bit cold at Christmas, iGlove for iPhones can be acquired for £6.99.
Tesco has unveiled a wide array of electronics in their build up to Black Friday, includin gGroov-E Boombox Portable CD Player worth £20 or a Kitsound X-Dock 3 Clock for £30. A HP Touchscreen Laptop can be purhcased for £320.
Currys PC World
A Samsung Smart Ultra HD LED TV is one of the best deals on offer at this retailer, with the price being dropped to £899, while Currys PC World is also selling a Dyson V6 cordless vacuum cleaner for £239. You can also get a Canon all-in-one wireless inkjet printer for £49.99.
At Carphone Warehouse a Nexus 5X 16GB is on sale for £279.99 and Xquisit XQ S20 bluetooth speakers are now at £44.99. A Samsung Galaxy J1 can be bought for £59.99.
For home cinema lovers, a Samsung bluetooth curved soundbar can be snapped up for £399 while a Sony smart blu-ray player is selling at £39. Panasonic smart freeview digital sets are being sold at £249.
And here's a little background
Black Friday is a relatively recent import, which last year rocketed to become the biggest shopping day of the year in the UK. Britons spent more than £800m in 24 hours - but that figure is expected to be dwarfed this year, with estimates ranging from £1bn to £1.8bn.
However, a debate continues over whether it is actually beneficial to those who take part, given the deep discounts that have to be offered, and the reputational damage that some retailers suffered last year when brawls broke out in stores up and down the country.
Still confused? Watch the short video below for a brief history of the day that has become a core part of retailers' - and consumers' - calendars.