http://www.biggerpockets.com/renewsblog/2011/08/08/is-your-significant-other-on-board-with-your-hair-brained-house-flipping-scheme/This is the link to @Danny Johnson's article.

The other thing I would do is make sure you tell everyone you know or encounter that you're looking to buy, (family, friends, hair salon, nail salon, literally anyone you can engage in small talk).

You just have never had a conversation with someone who is motivated.This is what they act like:"Oh my gosh, is my hair on fire?

I believe what is really bringing down prices is the "silver hairs" or older folks.They have already made their money, and most of them own their homes.

They have system in place where they feed off the new agents through profit shares.So when a brokerage charges fees for fat splits to new agents retirement funds are being fattened onthe upline.Many agents that gravitate toward lower fees are struggling agents or are investors.Investors can get you in hot water sometimes trying hair brained schemes to make money.Struggling agents either are part time working a JOB or work full time but don't have many deals close each year.Both make the agents require alot of training and time because they are inexperienced or they get rusty doing a deal.

You are free to select anyone who meets your requirements, if you have decided to rent only to people with black hair, then so be it!

We generally find that properties with hair have motivated sellers.

@Shane Woods If wanting to do EDDM I would suggest going in with other business owners to help cover the cost as the cost per preferred prospect is much higher to you when using EDDM.Pick a hair, nail, pizza, and  restaurant to share the cost with and have them split the cost equally thus making your ad space free besides the time investment. 

Why do some people dye their hair?

Car dealerships, fast food establishments, hair care services, ... all these franchise types (and more) have franchise owners who are established in multiple locations, some in multiple states.