scalping

The sale of something (especially a ticket for a popular show or sporting event) at a price far in excess of its face value and usually just before the event’s beginning; the buying of a security by someone with inside knowledge, such as a broker, before recommending that security for purchase to his/her client(s). Both the foregoing are considered unethical, and the first is illegal in many jurisdictions.

The act of selling items at a price far in excess of face value.