keybuyer
nounUK /ˈkiːˌbaɪə/
US /ˈkiːˌbaɪər/
A key buyer is a person who buys the most important things for a store or company.
The key buyer for the toy store chose which new games to sell.
OTHER MEANINGS
2. A person who makes the most important purchases for a group or family.
As the key buyer for her family, she picks all the groceries.
3. A big customer whose purchases matter most to a business.
The shop gave the key buyer a special discount.
4. Someone in charge of deciding what a company will buy.
The key buyer approved the order for new computers.