8 Things You Shouldn't Buy Used

Close up of baby shoes for sale
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Shopping second-hand is a great way to save money, but there are some things that you just shouldn't buy used (no matter how good the deal is). Here are some of those items.

  • 01 of 08

    Bicycle Helmets

    Mother adjusting daughter's bicycle helmet
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    A helmet that has been dropped or involved in an accident won't protect you the way it should—even if it looks fine. Get professionally fitted for a new helmet (free at most bike shops), and you'll have a helmet that is both safe and comfortable to wear.

  • 02 of 08

    Car Seats

    Car seat
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    Most car seats expire six years from the date of manufacture, and while the expiration date is easy enough to check (it's usually printed on one of the seat's labels), it's still a good idea to steer clear of used car seats. They may have been dropped, involved in a wreck or otherwise damaged—there's just no way to tell.

    Still pained by the thought of springing for a new car seat? Just remember that a new seat will include all of the latest safety features, so this is one time when buying new means getting more.

  • 03 of 08


    Couple trying out a new mattress

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    Mattresses have an average lifespan of just five to seven years. You might just end up with one that no longer provides proper support and comfort. They also come pre-loaded with dust mites, dander, and other things that you probably don't want to think about—and may even be allergic too. 

    To save money on a mattress, buy new; then, flip and rotate your mattress as often as the manufacturer recommends. It's an easy way to get a couple of extra years out of your purchase.

  • 04 of 08

    Swimsuits and Undies

    Undergarments hanging on clothesline outdoors

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    Some things just aren't meant to be passed on, and unmentionables definitely fall into that category. If you find yourself contemplating the purchase of a used swimsuit, consider this: fungus (as in the kind that causes yeast infections) can survive in clothing.

    Continue to 5 of 8 below.
  • 05 of 08


    Display of boots and shoes on shelves in traditional shoe shop
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    Buy a pair of shoes that someone else has broken in, and you could end up with foot problems that cost more to treat than a new pair of shoes. So not worth it!

    When to break the rule: If you come across brand new or worn-once shoes when you're shopping at yard sales, thrift stores, or flea markets, and they're a top-notch brand, go ahead and buy them.

  • 06 of 08


    Close-up of make up on table

    Ludovica Bastianini / Getty Images

    Buying used makeup could turn into a buy-one-get-one-free deal, as in: buy a tube of mascara, get a free eye infection. Since you really don't know what's lurking in that makeup container (or even how old it is), it's best to start fresh.

  • 07 of 08


    Female student working on laptop in college classroom
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    Bad things happen to good laptops. They get dropped, spilled on, infected with viruses, and left in hot cars. So, that "like new" laptop that you're looking at may keep chugging on for years, or it may crash tomorrow. Nobody knows.

    When to break the rule: If you find a manufacturer refurbished laptop that meets your specs, buy without fear. Even if something goes wrong, you'll be covered by a warranty.

  • 08 of 08


    Low angle view of mechanic by tires

    Tomasz Zajda / Getty Images

    Tires are expensive, so people usually wear them out before buying another set. If you find a killer deal on used tires, there may be a reason someone's ditching them early. They could be out of round, noisy, or have poor traction (none of which are problems you want).

    Another issue: Tires dry out over time, so if you don't know how old the tires are (and how long they've been off of a vehicle), that's another reason to be wary. Ford recommends replacing your tires every six years—even if the tread is good.