Bartering is one of the oldest forms of trade, but finding someone who wants what you have and also has something you want can be complicated.

Swapdom seeks to simplify this process by connecting people in ways that ensure everyone gets exactly what they want.

It does so through an algorithm that finds a circle where every user gets an item they requested, giving new life to old items like gently used clothing, toys and home goods.

"If I wanted your shirt and you wanted someone else's skirt and they wanted someone else's shoes and they wanted my item, then we'd all have what we wanted," Swapdom Marketing Director Turi Fesler told the Columbia Daily Tribune.

Here’s how it works: You post items you’d like to trade and then browse items you’d like to receive. You click to request a trade and offer goods you’re willing to exchange.

Although two-way swaps are possible, most of Swapdom’s trades are multi-user ones that have involved as many as nine people.

Once all the participants in a trade agree to the swap, each user pays shipping and a $2 service fee.

Swapdom currently has a few thousand users, and about 30 percent of proposed swaps are successful.

As more people use the site, Fesler says more swaps will occur at faster speeds.

Watch the video below to learn more about Swapdom.

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Laura Moss writes about a variety of topics with a focus on animals, science, language and culture. But she mostly writes about cats.

Swapdom: It's bartering with a computer-assist's algorithm organizes multi-person swaps, so you get the items you want without having to negotiate.