Looking to pick up a big-screen 4K TV, a laptop for your new grad or a gift for father's day? Memorial Day weekend means a lot of great products are going on sale, including items that are rarely on sale. 

The sales have already begun and will last through Monday. But, there's no guarantee that they'll still be in stock, so if you see a deal, jump on it.

Keep in mind, though, that not deal is as good as it make seem. To make sure you're getting a real bargain, it's a good idea to use a price tracker that will tell you whether you're getting a great price. The Camelizer browser plugin is a great reference that will show you the price trends of any product on Amazon — and you can use it for a quick comparison against any sale you see. For more advice, take a look at our favorite price trackers. And while researching, double check to make sure the product ratings aren't being boosted by fake reviews.

To get you started, here are the best bargains we've found online.

Apple Products

Apple MacBook Air - latest model (Core i5, 8GB RAM, 128 GB SSD) for $897.60 (usually $1,199.00) when you use code APPLEMEM19 on Google Express 
Apple iPad - latest model (9.7", 32GB, Space Gray) for $246.49 (usually $329.99) when you use code APPLEMEM19 on Google Express or $249.00 (in gold, silver or space gray) on Walmart
Apple Watch 4 (44mm, silver aluminum case, white sport band, GPS only) for $379.00 (usually $429.00) on Amazon 
Apple Watch 3 (38mm, sliver aluminum case/white sport band or space gray aluminum/black sport band, GPS only) for $199 (usually $279) on Amazon
Apple iPhone X (unlocked, 64GB, silver) starting at $649.99 with service activation (usually $899) on Best Buy

Laptops and Tablets 

Acer Nitro AN515-53-55G9 gaming laptop (15.6", Core i5, NVIDIA GeForce GTX 1050Ti graphics, 8GB RAM, and a 256GB SSD) for $629.99 (usually $799.99) on Best Buy.
Acer gaming laptops and monitors on sale on Acer. Plus, 20% off Sitewide Store Sale with coupon code ACER20. Free shipping included for all sale items. 

HP EliteBook x360 1080 G3 Notebook (13.3", Core i5-8250U, 8GB RAM, 128GB SSD) starting at $1,697.92 (usually starts at $3,032.20) on HP 
HP Pavilion  15Z (15", AMD Ryzen 5, 16GB RAM, 256GB SSD) starting at $519.99 (usually starts at $1,299.99) on HP

Lenovo ThinkPad X1 Carbon 5th Gen (14", Core i7-6600U, 8GB RAM, 512GB SSD)  for $1,193.34 (usually $1,979.00) when you use code SAVE10 on Lenovo 
Lenovo IdeaPad 730S (13.3", Core i7-8565U, 8GB RAM, 256GB SSD) for $679.99 (usually $1,099.99) when you use code SAVEON730S on Lenovo 
Lenovo Tab 4 10 Plus (10.1", 4GB RAM, 64GB storage) for $224.99 (usually $379.99) when you use code SAVE10 on Lenovo
Lenovo laptops, tablets, monitors and accessories up to 50 percent off on Lenovo

Microsoft Surface Pro 6 (12.3", Core i5 8GB RAM 256GB SSD Black with Black Type Cover) $926.99 (usually $1,479.99) when you use code MEMORIAL10 on Google Express

Smartphones

Samsung Galaxy Note 9 (unlocked) for $799.99 (usually $999.99) on Samsung

Accessories

JBL Link 10 Waterproof Bluetooth speaker for $39.99 (usually $149.95) on eBay

Microsoft Surfact Headphones for $249.99 (usually $349.99) on Microsoft

Fitbit Alta activity tracker for $50.99 (usually $99.95) when you use code MEMORIAL15 on Google Express

Get up 30% off sitewide on Speck products

TVs

LG 55" Nano 9 Series 4K UHD LED TV (model 55SM9000PUA) for $996.99 (usually $1,396.99) on B&H Photo
LG 65" B8 Series 4K UHD OLED TV (model OLED65B8PUA) for $2,296.99 (usually $3,299) on on B&H Photo 
LG 86" UK6570 Series 4K UHD LED TV (model 86UK6570PUB) for $2,496.99 (usually $4,496.99) on B&H Photo

Samsung 75" NU6900 Series 4K UHD LED TV (model UN75NU6900) for $1,097.99 (usually $1,499.99) on Walmart 
Samsung 65" Q80 Series 4K UHD QLED TV (model QN65Q80RAFXZA) for $1,997.99 (usually $2,799.99) on Amazon 
Samsung 55" NU6900 Series 4K UHD LED TV (model UN55NU6900) for $397.99 (usually $527.99) on Walmart

Toshiba 55" Fire TV Edition 4K UHD LED TV (model 55LF621U19) for $349.99 (usually $450.00) on Amazon

Gaming

Microsoft Xbox One X - 1 TB - Playerunknown's Battlegrounds Bundle for $299.70 (usually $499.00) when you use code MEMORIAL10 on Google Express 
Sony PlayStation 4 Pro for $314.10  (usually $399) when you use code MEMORIAL10 on Google Express

Smart Home

Neato Botvac D6 robotic vacuum cleaner for $399 (usually $729) from Best Buy 
iRobot Roomba 960 Wi-Fi Connected Robot Vacuum for $549.99 (usually $699.99) on Home Depot

Dyson V8 Animal Cordless Stick Vac for $299.00 (usually $399.99) on Home Depot

TP-Link Smart 2-Outlet Wi-Fi In-Wall Plug (works with Alexa and Google Assistant) for $79.19 (usually $119.99) on eBay

Appliances

LG TurboWash360 front load washing machine (model WM3900) for $898.20 (usually $1,199.00) on Home Depot
LG 4-Door French Door Smart Refrigerator with InstaView (32 cu Ft., counter depth) for $2,997.90 (usually $4,299.00) on Home Depot
LG Front Control Dishwasher with QuadWash and EasyRack Plus (model LDF5545ST) for $548.10 (usually $699.00) on Home Depot

Samsung Family Hub Refrigerator (24.2 cu ft) for $2,197.80 (usually $3,110.00 on Home Depot

Whirlpool Smart Slide-In Electric Range with Scan-to-Cook Technology for $1,497.60 (usually $2,099.00) on Home Depot

Up to 40% off large appliances at Home Depot

[Image credit: Sale in red, white and blue via BigStockPhoto]