'Merchants' in the Bible

So Abraham listened to Ephron [and agreed to his terms]; and he weighed out for Ephron the [amount of] silver which he had named in the hearing of the Hittites: four hundred shekels of silver, according to the weights current among the merchants.

Then as the Midianite [and Ishmaelite] traders were passing by, the brothers pulled Joseph up and lifted him out of the pit, and they sold him to the Ishmaelites for twenty shekels of silver. And so they took Joseph [as a captive] into Egypt.