Everywhere else I tried that same message/technique it failed miserably.

One such technique is to "answer their question with a question", after giving them a brief statement.

MLS is the way to go, how you decide to use it and who you use it with make all the difference.I do, however, agree with all the other selling techniques you've mentioned.

As is typical of other gurus, LeGrand left out much of the disadvantages of the various techniques.

Your formula is a knock off of the income capitalization valuation technique (Value = Net Operating Expenses - Actual Cap Rate) but takes a turn for the worse when you use the "one size fits all" cap rate average.

I'd try the "pay him off" technique first.

When we add new marketing techniques to our business we try to stick with it for at least 1 year to measure results!

When you are learning to value and compare properties yourself, it can be very helpful to learn the basics of appraisal techniques, and get your hands on some actual real estate appraisals from your market to see how a professional appraiser actually makes these adjustments. 

I was wondering what is your guy's favorite marketing technique when it comes to finding flip deals.

Author and investor @Chad Carson used the techniques and systems outlined in his book to retire at age 37.