A more thorough explanation:

Definition: A bargainor is the person who sells something in a negotiated exchange.

For example, if you go to a flea market and negotiate with a vendor to buy a vintage record player for $50, the vendor is the bargainor. They are selling the record player in exchange for your $50.

Another example could be a real estate transaction. If you negotiate with a homeowner to buy their house for a certain price, the homeowner is the bargainor. They are selling their house in exchange for your money.

The examples illustrate the definition of a bargainor by showing that they are the person who is selling something in a negotiated exchange. They are willing to part with their item or property in exchange for something else, usually money.