A THRIFT store has sold a high-end purse for $13 — but it's worth over $1,000.

An avid thrifter with an eye for detail spotted a Saint Laurent purse at a second-hand store.

The designer bag was on a rack with various other purses

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The designer bag was on a rack with various other pursesCredit: TikTok/msfili
She decided to buy the bag after seeing a serial number on the inside

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She decided to buy the bag after seeing a serial number on the insideCredit: TikTok/msfili
The bag has resold for over $1,000

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The bag has resold for over $1,000Credit: Rebag

The TikToker (@msfili) has racked up over 24,000 followers by sharing videos of the valuable things she finds while thrifting.

On a recent trip to the thrift store, she found a bright yellow purse with gold hardware.

In a video, she zoomed in on the buckles on the bag that said Saint Laurent.

It appeared to be a Saint Laurent Fermoir leather bag.

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Since it was priced for just $13 she decided to investigate a bit more.

The inside of the bag looked very new and was covered in a suede material.

There was a key detail in one of the inside pockets that let her know she had a good find — a serial number.

Most authentic designer bags will have a serial number on the inside somewhere that's stamped into the fabric.

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The same purse in the same color recently sold for $1,231 on Poshmark.

And another one sold for $1,070 on the resale site Rebag.

TREASURE HUNT

Designer purses end up at thrift stores more often than most people would think.

A shopper in Canada paid just $60 for a bag that resells for over $700.

The TikToker (@maiifinds) said she "started screaming" when she went into a store called Just Thrift that sells designer merchandise only.

She found items for both men and women from luxury labels like Burberry and Canada Goose.

Her big find of the day was a Stella McCartney bag that was priced at $59.99, but she said it retails for over $700.

The U.S. Sun found a similar, brand-new version available on swanky retailer Bergdorf Goodman's website for even more. It has a retail tag of $1,095.

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Another shopper paid $11 for a designer item and was able to resell it for $160.

Plus, The U.S. Sun previously reported on a secret trick that a shopper uses to spot affordable designer items.