Short letters VS postcards VS bandit signs

[Gaston Barua]

Hello All!

I am a new investor and am looking for that first wholesale deal! I am preparing a marketing campaign to find a seller quickly. 

Between short letters, postcards, and bandit signs which would be the most efficient to begin my campaign with? I live in Los Angeles by the way and I have heard you may need a permit to post bandit signs. 

Any direction would be much appreciated.

thanks and happy Investing!