Answer: profiteer

AnswerCrossword Clue
PROFITEEROne who demands an excessive markup
PROFITEERCharge too much
PROFITEERDevote oneself to making excessive gains.
PROFITEERWartime opportunist
profiteera person who takes advantage of an emergency to make exorbitant profits / to act as a profiteer
profiteerMake or seek to make an excessive or unfair profit, esp. illegally or in a black market