I suppose fighting was seen as a glorified trade: you sold your skills.

They had had to sell themselves and their skills.

"Students are drawn more to study problem areas so they can sell their skills to the government and education," he says.

They must get out to sell their technical skills, he said, primarily to the Government.

But like many people, they sell their skills on their own time.

The players are justified in fighting for the freedom to sell their skills in an open market.

Also mercenaries often sell their skills at this festival as well.

He is a professional thief who sells his skills to the highest bidder.

Black Jack is a medical mercenary, selling his skills to the highest bidder.

That's why some free agents have decided that when they cannot sell their skills, it may be worthwhile to give them away.