I told him if he would offer me xxx dollars, I would be willing to sell.I guess that price was OK with him because he said his agent was writing up a contract for me to take a look at today.I listed it myself (craigslist, zillow, etc.

If the wholesaler said the ARV is XXX.

I am in the process of purchasing an REO from BANK XXX. 

I currently owe $67,xxx on my unit and have $15k saved up.

You have no control over how someone will react (or over react) It is not offensive to say "I see you own a vacant home at XXX Main st.

Is it something like under 5% of rent for maintenance costs or is it set at $xxx per door or less, etc?

I did sign up for them for e-mail alerts and just keep getting offers to attend boot camps for $xxx.

Tell them if they leave peacefully, you will give them $xxx to return the premises to you clean and with no damage.  

The language in my contract is as follows: "....the latter does hereby purchase from the former the following described property......The property is to be sold at and for the price of xxx" The EMD is a faithful gesture to seller that buyer will follow through on his/her promise.

(e.g. can I buy it for $xxx from the "previous owner"I found this article quite enlightening as well.http://www.nolo.com/legal-encyclopedia/types-property-liens.htmlI think a matrix by state / by county / by type of foreclosure (judicial or non judicial) / by other variables would be a great tool.