The internet has shared the woes of a US woman who sold a sofa online for $500, only to learn hours later that it could be worth 40 times as much.

Jules Schreiner recently posted her story on popular social media site, TikTok, in which she described her mistake.

Jules had obtained the sofa for free and advertised the couch for $500 on Facebook Marketplace, without doing any prior research on the furniture.

Within seconds, she had an offer for the full price she had advertised and was delighted with the sale.

However, later she saw the new owner post it on Instagram, where they revealed more about the brand and what it might be worth.

After finally researching her recent sale, Julie learned that the sofa was designed by Vladimir Kagan, an icon of mid-century modern American furniture design.

She then found another sofa for sale worth up to $20,000, which was by the same designer but in a different style.

Jules added: “Thought I had got a great deal on FB market place but you know things are always too good to be true.”

Since releasing the video, it has racked up thousands of views, as people shared her pain of losing out on thousands of dollars.