As a lay person who knows nothing about plumbing, that sounded reasonable; he did an inspection, saw he had an issue, and said he would fix whatever issue it was for X amount. 

Hey, all I have a seller that still owes a mortgage and is behind and she is ok with catching the past due amount up and taking over the payments how do I make this happen?

You will be required to put down 10% of the loan amount. 

I've also seen a good amount of flip potentials there. 

As for the electric bill you went out of your way and spend beyond a necessary amount to insure their comfort.

Hi @Eddie Wright, I would get the exact amount of back taxes that are owed from the tax collector's office and make it VERY clear to the buyer that they will have to pay those costs as part of the closing.

What is the smallest amount of money you have lost a bid by?

@Jeff CopelandYes, both properties sit on the same parcel.At the current condition the duplex is in, I dont think it would refinance for the amount needed to purchase it.

I have a tenant I need to try and renegotiate the amount because it is not profitable for me to rent at the initial negotiated amount.

There is always a good amount of people willing to rent per room.