What is an act of trading goods or services between two or more parties without the use of money called?

TRUE CANADIAN Laurel, I used a barter for services to mow my lawn for my husband antique tractor. I did appreciate the the trade off now he move out of town and had a friend to take over. But the friend mowing is not that good.

CS, I think you are likely referring to haggling rather than bartering at a Market .