As Orlove noted, barter may occur in commercial economies, usually during periods of monetary crisis. During such a crisis, currency may be in short supply, or highly devalued through hyperinflation. In such cases, money ceases to be the universal medium of exchange or standard of value. Money may be in such short supply that it becomes an item of barter itself rather than the means of exchange. Barter may also occur when people cannot afford to keep money (as when hyperinflation quickly devalues it).
Yes…yes…yes! When I went to school to become a Registered Massage Therapist, and discovering how difficult it (still) is for a male RMT to get a legit job be it here or a small town, our instructor told us to consider bartering whenever possible. This was in a smaller city (100,000) where bartering can do well for you to make inroads with the Downtown Council, locally owned businesses; let’s say for example a new yoga studio or health club or salon is opening. I bring my massage chair over and do free 10 minute chair massages and give out my business card, in exchange, the yoga groups can use my space if they need to add an extra class. The salon knows if they’re doing a training on a day I’m not working, they can use my studio. Things like that.
No academics I talked to were aware of any evidence that barter was actually the precursor to money, despite the story’s prevalence in economics textbooks and the public’s consciousness. Some argue that no one ever believed barter was real to begin with—the idea was a crude model used to simplify the context of modern economic systems, not a real theory about past ones.