Dealer: Find something that will get value. They buy it and store it for a time. they stock pile it or inventory it and sell them for a higher price by using own money.

Broker-Dealers have client lists and contact clients for helping buying a stock or a bond, for charging a small fee. Sometimes they will use their balance sheet, their own money, for structuring such trades and then match buyers and sellers.

The BD business is about managing balance sheet and capital risk