How can an apartment broker advertise to landlords to sell their apartments?

sf: How can an apartment broker advertise to landlords to sell their apartments?
I’ve been helping an apartment broker guy advertise to people looking for apartments, and now he wants me to try to figure out a way to advertise to landlords who need someone to sell their apartments. I’m having trouble finding any information about this.

Answers and Views:

Answer by Puran
apartment broker advertise is products of goods selling.