Act as a "Finder" - a person who gets a cash fee from the seller and buyer. Example: Suppose you read in the newspapers, or hear about a person who has a million dollar building to sell and you just happen to know of another person who might be interested in this kind of real estate. You then merely contact the seller, tell him you have a potential buyer whom you will introduce to him if the seller will pay you a 2% commission fee.
If he agrees, you introduce the prospective buyer to him - then, if the buyer and seller get together on a deal, you will neatly EARN a $20,000 commission (2% of the selling price). The introduction can be made in person or by mail. And it is possible for you to find hundreds of these opportunities by checking the classified section of the major business papers and local papers.