The stacked Spice O’ Life vintage Pyrex casserole stashed in my mother’s cupboard has seen more meals of scalloped potatoes, lasagna, and chicken with wild rice than either of us can count. These trusty dishes have stood the test of time and are now sought-after collectibles.

Pyrex clear glassware was introduced by Corning Glass Works (now Corning Inc.) in 1915. At that time, Corning used a special borosilicate glass that resisted the expansion and contraction that occurs during quick, extreme temperature changes. Not only was it exceptional to cook with, the glass was ideal for laboratory glassware and railroad lamps. In the 1930s and ’40s, Corning started using soda-lime glass. The iconic set of four stacking mixing bowls in primary colors (also still in Mom’s kitchen cupboard) came along in 1945. In 1998, Corning divested its consumer products division, forming World Kitchen, LLC, which continued to manufacture Pyrex using soda-lime glass.

While a majority of vintage Pyrex pieces can be bought for less than $20, prices can be all over the board. Consider comparing items with an online search. For example, that mixing bowl set of Mom’s sells for $40-$100 on eBay. Look at the completed auctions to see what pieces actually sold for. Simple refrigerator dishes can sell for as little as $6, so it’s easy to start small and work your way up to more valuable pieces, like limited-edition promotional items that tend be more rare.

TIP: Pieces from 1915 to 1970, pink items, and vintage Pyrex in primary colors seem to be the most valuable and sought-after. During my research, I found a vintage set of pink Gooseberry pattern dishes on Etsy for $1,850.

You can find vintage Pyrex just about anywhere. Online resources include eBay, Etsy, Craigslist and Amazon. Locally, check out your Goodwill store and area flea markets. You’ll find vintage Pyrex at antique stores, however pieces can be a bit pricier there because people understand the value of what they’re selling. Antiques stores can also be good places to find those rarer limited-edition promotional pieces.

TIP: Often, the best prices and hard-to-find pieces of vintage Pyrex are found at yard sales, garage sales and church rummage sales where sellers may not be as savvy about what they’re worth.

No matter where you purchase vintage Pyrex, inspect it closely. While this can be hard to do online, there are a few things you can look for. Notice any obvious scratches, chips, cracks or stains. If the item originally came with a lid, is it included? What is the condition of the finish? If you’re buying in person, run your fingers over the edges, noting any chips. You can also hold it up to the light to check for scratches and hairline cracks.

TIP: If you’re a serious collector and concerned about breakage when purchasing Pyrex online, offer the seller additional money and request extra safe protective packaging.

If you’re like me, you value vintage Pyrex for its durability. I still use my grandmother’s Pyrex measuring cup even though the numbers are nearly worn off. (Here are some handy tips on how to measure ingredients.) My heart is tied to the meals and memories associated with these dishes, and while collectors may gasp, I use them regularly in homage to the cooks that have come before me. Make a few casseroles like Grandma used to make and you’ll see why. (And here are a few vintage cooking tips from Grandma.)

TIP: To ensure your Pyrex doesn’t crack, avoid extreme temperature changes. Never take a Pyrex dish from the freezer and place it directly into a hot oven. Conversely, don’t take a hot dish straight from the oven and set it on a cool or wet surface. Avoid placing Pyrex under a broiler, inside a toaster oven, or directly over a flame, stovetop or grill. And never put an empty Pyrex dish in the microwave.

TIP: Add a small amount of liquid to cover the bottom of the dish before cooking foods that may release liquid. This will ensure that the Pyrex and the liquid aren’t at different temperature extremes.

To keep vintage Pyrex looking its best, clean it with warm water and a mild dish soap. If that doesn’t take care of stubborn marks or stains, try using a Magic Eraser (but always test on an inconspicuous area first). And be gentle—no vigorous scrubbing! Avoid using any kind of abrasive cleaner on the colored or patterned areas. Some folks have been successful removing interior silverware marks with Bar Keepers Friend (but avoid scrubbing near any patterns). A good rule of thumb to follow for cleaning any vintage pieces in the dishwasher: When in doubt, don’t. Pyrex patterns and finishes will fade or come off after multiple machine washings, Remember my grandma’s nearly blank measuring cup? Guilty. (Have a vintage cast-iron skillet? See how to clean it here.)

TIP: To clean the tiny crevices around the rim and the raised mark on the bottom, use a sharp, pointed wooden toothpick. Dampen the surface and angle the toothpick into the crevice, applying slight pressure and rotating the toothpick as you push it along.

To avoid marring the finish, avoid stacking vintage Pyrex bowls upside down on top of each other. If you have pieces that won’t be used often, store them in boxes with layers of heavy paper between each piece, and store the lids separately. If you keep them out for display, clean and dust them regularly.

TIP: Whether you display your vintage Pyrex bowls or casserole dishes or keep them in your cupboard for everyday use, stack them upright with a small, lidded plastic food container inside. The container raises the next bowl or dish up enough so the sides don’t touch, eliminating the chance for scratches and allowing you to see the pattern better.

Whether you want to display it or use it every day, vintage Pyrex adds fun and color to any kitchen. And let’s face it, any dish that you allows you to mix, cook and serve in one is a bonus for today’s busy cooks.

With dozens of colors, patterns and shapes, vintage Pyrex is an available, durable and generally affordable passion for retro dish lovers everywhere. A butter dish here, a mixing bowl there, a couple of casseroles and you’re on your way to a collection. So what makes vintage Pyrex so popular?

Mason jars aren’t going anywhere anytime soon. And those blue-tinted vintage Ball jars? Well, those can sell for a pretty penny to collectors. Whether you’re looking to resell them, repurpose them as home decor or—dare I say—actually use them for canning, you’ve got countless reasons to scoop up a few if you spot them on a thrift store shelf. (Get inspired by these totally genius ways to use glass jars in your home.)

Mismatched dishware is very on trend right now, so if you find a few dishes short of a set or a pretty bowl here and there, it’s easy to build a shabby-chic collection of mix-and-match dishes that give your table depth, character and a fun color palette.

Try your best to ignore that garish clown face staring at you from the velvet canvas. If the artwork’s iffy but the frame is stunning, just pop out the picture and use that ornate frame to hang something you really love. Even outdated wood or metal frames can be painted a fun color to give them new life—and a new sense of style.

Solid wood furniture can be quite expensive when purchased new. But thrift stores are loaded with wooden desks, dressers, chairs and benches that have timeless style and a teeny price tag. Look for clean lines and good construction—if it’s simple and sturdy, it’ll fit in with any style home. And those unsightly brass knobs? They’re easy and inexpensive to replace to give outdated furniture a modern makeover.

If you see a vintage pink Pyrex bowl sitting on a thrift store shelf, stop what you’re doing and put it in your cart instantly. Collectors go crazy for the pretty colors and bold patterns, and their resale value is off the charts. Even if you’d like some of your own, the cute factor and durability make them stylish, timeless kitchen workhorses. Learn more about vintage Pyrex dishes, here.

When purchased new, heavy-duty cast-iron skillets, pots and pans can carry price tags nearly as hefty as their weight. But if you find them at a thrift store, you can bring home these beloved kitchen staples for a serious bargain. Even if they’re in rough shape, it’s easy to restore cast-iron cookware to like-new, food-safe conditions. And once you’ve reseasoned your pan, go ahead and whip up any of these amazing cast-iron skillet recipes.

Unless they’re building a library, people often get rid of books first when trying to declutter the house. That means thrift stores are loaded with popular page-turners for prices often 10 times lower than bookstores. So whether you’re looking for a summer read, historical fiction or your favorite sports star’s autobiography, if you don’t mind doing some digging, you can find a whole collection of books just waiting to sweep you away.

Even if it’s a big tarnished, solid silver items can be polished and restored to like-new condition fairly easily—and they can be sold for a great price, depending on the current value of silver. Check to see if the piece is solid by tapping on the surface and listening for a high-pitched ringing sound.

Faux greenery, plastic pumpkins, heart-shaped dishes and other holiday decor sometimes have their own sections in thrift stores. While some of it might be a little gaudy (and who are we to judge?), you can usually find holiday staples with timeless appeal—Christmas-tree stands, festive dishware and ornaments—for mere cents.

Believe it or not, Cards Against Humanity can get a little tiresome after you’ve played it for the hundredth time. A trip to the thrift store can mean stumbling upon a new game-night classic for super cheap. Just make sure to open the box and check that all the pieces are there and intact. If it’s missing directions, do a quick search on your phone to see if they’re available online.

Seafoam green jadeite—popular in the 1930s—is making a big comeback in home decor. And while its retro style is reason enough to add it to your collection, it’s also really valuable if you ever want to resell. Look for McKee, Jeanette or Fire-King logos on the bottom of each piece—they’re among the most valuable brands of jadeite, with items reselling for as much as $100 apiece.

More from Taste of Home: 5 items to buy in bulk (and 4 that aren’t worth it) How to revive a grimy baking sheet 10 things never to pass up at Goodwill

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