This refers to exchange of goods and services for goods and services.this trade has several drawbacks.
- It is difficult to estimate the value of one good with another
- It depended on double coincidence o wants between traders.
- Perishability of some commodities tomatoes,fruits and milkcould go bad very easily hence could not be stored.
- Divisibility aspect was a problem ie it wasn’t easy to divide some commodities into smaller goods.
Portability-it was difficult to transport goods since some were heavy and bulky.