And, if you’ve been in the Preparedness community for any amount of time, you are familiar with Fernando “Ferfal” Aguirre.  He wrote about his experiences of the economic collapse in Argentina in his very popular book,  The Modern Survival Manual: Surviving the Economic Collapse.  Argentina hasn’t really recovered from their collapse many years ago.  This video discusses one Barter Market Club that is located in an abandoned textile factory.
In a small economy where individuals specialize in trades, they may find the process of setting up a centralized currency and maintaining it an unnecessary burden in order to trade. One option may be to use a commodity to exchange value between parties that want to trade goods or services and this is why gold and silver have been useful forms of currency in many cultures and times. Another option may be to use a barter system to trade.
Companies may want to barter their products for other products because they do not have the credit or cash to buy those goods. It is an efficient way to trade because the risks of foreign exchange are eliminated. The most common contemporary example of business-to-business barter transactions is an exchange of advertising time or space; it is typical for smaller firms to trade the rights to advertise on each others' business spaces. Bartering also occurs among companies and individuals. For example, an accounting firm can provide an accounting report for an electrician in exchange for having its offices rewired by the electrician. 

The Internet provides a new medium for the barter exchange industry.  Pure Internet-based barter companies differ from traditional, organized trade exchanges in that they do not have a physical office. In modern Internet barter exchanges, there is an agreement or process in place to value goods and services exchanged, which is facilitated by the barter exchange for a fee. A barter exchange functions primarily as the organizer of a marketplace where members buy and sell products and services among themselves.
On paper, this sounds a bit like delayed barter, but it bears some significant differences. For one thing, it’s much more efficient than Smith’s idea of a barter system, since it doesn’t depend on each person simultaneously having what the other wants. It’s also not tit for tat: No one ever assigns a specific value to the meat or cake or house-building labor, meaning debts can’t be transferred.
When barter has appeared, it wasn’t as part of a purely barter economy, and money didn’t emerge from it—rather, it emerged from money. After Rome fell, for instance, Europeans used barter as a substitute for the Roman currency people had gotten used to. “In most of the cases we know about, [barter] takes place between people who are familiar with the use of money, but for one reason or another, don’t have a lot of it around,” explains David Graeber, an anthropology professor at the London School of Economics.