Costco is practically a mecca for bargain-minded shoppers. Sure, you have to purchase an annual membership to get in the door — but in return, you get access to a world of high-quality goods at great prices, all backed by a generous return policy.
Whether you need a new household appliance, a set of tires for your car, seasonal clothing, fresh produce, or the biggest containers of Lysol wipes you've ever seen, you can find almost any type of product at Costco.
But despite its legendary reputation for great prices, there are lots of common Costco mistakes that could end up costing you money. Make sure you're not doing any of the following. (Not a Costco member? You can apply here.)
Related: The Top Deals at Costco Right Now