From pricing a product at £99.99 to splashing red labels across a site, many of the tricks used by online retailers to manipulate people are obvious.
But while we think we may be immune to these techniques, digital-savvy retailers have since developed more subtle tools to get us to part with our cash.
For instance, if you spot an interesting deal online during the Black Friday sales and then click away from it, it may end up following you around the internet.
Hours later, as you scroll through Facebook on your phone, the same product might reappear in an advert even though you were looking at the sales on your laptop.
There’s even a possibility that the deal you’ve been offered was never real and the item only appeared as on sale because the seller raised its price before the sales.
Here are some of the most used tactics, and how to game the system:
Fake sales used to make items look heavily discounted
Many e-commerce sites and sellers manipulate the price of items to create the appearance of a steep discount.
For example, sellers might increase the price of an item in the weeks leading up to Black Friday and then bring it down on the day itself, making it appear that it’s a compelling offer. In reality, you’re paying the retail price of the item and haven’t saved any money.
Earlier this week, Which? released research which found that 85pc of Black Friday deals on sites such as Amazon, Argos and John Lewis were the same price or cheaper six months earlier. Just 1pc of the 219 items tracked were at their cheapest price on Black Friday.