Some websites advertise your favorite beauty product at an outrageously low price, but they often seem to be out of stock, and you’ll have to wait weeks to get the product advertised.

Some sites sell you expired or outdated product versions and bury this fact in tiny print on their hard-to-find terms of service page.

Sometimes you see a low price advertised on an online shopping service, and when you click the ad for that product you’re taken to a totally different product. That wasn’t a computer error, it was outright trickery.

Some sites offer what appears to be a site wide discount to get your attention, but then when you try to use it, you find it is not available because there was a disclaimer in the offer that said not all products are included.

Some sites offer a lower price in their advertisements for one size to get your attention, and then you find that the size you want is either not available or sold at a non-competitive price.

Dynamic pricing is a sneaky strategy online merchants use to show different prices to different customers according to your location, your browsing and spending patterns and current demand for the product.

Other gimmicks involve charging more money for shipping at the checkout when they know you’re less likely to cancel your order.

Many sites offer one time savings to new customers, then overcharge on reorders since many existing customers don’t price shop when reordering. Don’t Let This Happen To You.