When you think about shopping at Costco, bulk groceries and household supplies typically come to mind. You don't necessarily think about making a run to the warehouse club if you're looking to buy a designer watch or you need to re-up your stash of high-end skin cream. However, you could be missing out on huge savings. Costco stocks a limited selection of luxury goods at discounted prices both in-store and online.

We scoured the aisles at a Washington, D.C.-area Costco location and clicked around on Costco.com to see which luxury goods were available to members. Then, we compared the warehouse club's price against the manufacturer's suggested retail price for each item. Take a look at our surprising list of a dozen luxury items that are cheaper at Costco.

Are the Luxury Goods Sold at Costco Authentic?

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But before you make a purchase, a word of caution. From fake Rolexes to knockoff Manolo Blahniks, counterfeit merchandise has long been the scourge of the luxury-goods market. Costco guarantees the authenticity of all the products its sells, a spokesperson confirmed, including luxury goods. The warehouse club also offers a "100% satisfaction guarantee," though the return policy on some items including high-end electronics and diamonds can vary. As with any retailer, it's important to understand the return policy before committing to a major purchase.

It's worth noting, as well, that the warehouse club isn't an authorized reseller for certain high-end products such as designer handbags and fragrances. However, don't be surprised if you see some of these luxury items on Costco shelves, as we did. , so-called gray market goods can end up