Translation of "Profit" in Chinese

I made a good profit by selling my car.

卖了我的车，我收益不少。

He is making use of the collective's name for his own profit.

他在利用集體的名義，為自己謀利。

Peter was an altruistic video game player; he would give items to people who needed them, rather than selling them for personal profit.

彼得是一个利他主义的游戏玩家，他会把东西给需要的人，而不是为一己之私利出售。