make an unreasonable profit, as on the sale of difficult to obtain goods

someone who makes excessive profit ( especially on goods in short supply)

Profitless.

One who takes unfair advantage of an economic situation such as war brings about to make undue profits, as in steel, meat, wheat, sugar, cotton, munitions, or other necessities.

To make excessive profits in business.

One given to profiteering.

Thus in an organized society the acquisitiveness and self- assertion proper to a vigorous primitive dependent on his own powers survive as the sins of envy and covetousness, and are seen operating in the dishonesty of the burglar, the greed and egotism of the profiteer: and, on the highest levels, the great spiritual sin of pride may be traced back to a perverted expression of that self- regarding instinct without which the individual could hardly survive. – The Life of the Spirit and the Life of To-day by Evelyn Underhill