Occasionally we will write about Yellow Letters, the big direct mail product that 10's of thousands of real-estate investors and home flippers use to attract sellers. There are debates all around the web on when and how to use them, why do they work and are they worth the investment and how can you guarantee it to work for you? For a Direct Mail Marketing company such as us, we nestle ourselves between the internet world and the direct mail world, it's a unique area for us, b