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Apple iPad Air 2 (Photo : Twitter )

The vast majority of retailers have not announced their 2015 Black Friday tech deals yet, but retail giants such as Walmart's Sam's Club and Amazon, and PC maker Dell are already offering pre-sales leading up to the biggest shopping day of the year. In fact, some Black Friday specials have already popped up, while consumer electronics products including 4K HDTVs and game consoles such as PlayStation 4 and Xbox One will likely be featured in many future discount announcements.

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Walmart has not announced any Black Friday deals yet. However, its subsidiary Sam's Club will have a one-day pre-sale on November 14, Saturday.

It will include discounts on off-brand TVs from Vizio, the 64GB iPad Air 2 with Wi-Fi ($150 off), and a PS4 bundle ($299 including one free game). Sam's Club members can enjoy the specials at the online and physical stores.

Meanwhile, Amazon has already opened its "Countdown to Black Friday Deals" store that includes tons of price cuts. Prime members can enjoy early access to 30,000 deals. Non-members can also access tens of thousands of price-slashing deals, but not early.  

Amazon will roll out seasonal specials from now until December 22. However, Black Friday deals will include the 2nd-gen Motorola Moto X at about $200, and video games including  "Metal Gear Solid V" for about $40 ($20 off), according to Android Headlines.

Dell started advertising Black Friday deals last month. They include a 60-inch Vizio 4K Smart TV for about $800 ($700 off), desktops for around $100, laptops as low as about $150, and 500 GB Xbox One bundle that includes "Gears of War," "Fallout 4," and an extra controller for approximately $300 ($170 off).

Dell will also offer lots of sales on non-Dell devices such as televisions, wearables, game  consoles, and headphones. The holiday deals will start at 6 p.m. ET on Thanksgiving Day, according to Modern Readers.