I have been looking at various marketplaces in GA and have a few friends that have invested in Atlanta. 

Mail it certified so you can verify receipt and prove it in court.

Think of Backyard as both a producer and a marketplace for selling major aspects of the home, in any shape it might come in.

The marketplace will determine the cap rate based on the income and the risk perceived. 

Give them a date in writing , certified mail .

But i think your first step is to learn the marketplace and how to evaluate properties.

Do you think it is an underserved area of the marketplace?

Strategic Analysis ModelFrom CCIMI created the chart below from my CCIM (Certified Commercial Investment Member) study.

if you want to take it a step further just have the house certified dry. 

Even my bread and butter consistent investors I work with just do 1-2 per year.Then you have all these "investors" running around the marketplace who think they know what they are doing because they have a license making huge mistakes.