Determine the cost to replace the entire floor by a professional, divide by the total square footage in the room to be replaced to get a per square foot price, and perhaps tack a site visit or administrative fee on it (reasonably of course) since no one is going to come out to replace 5 square feet of flooring for $30 or $40 if it's $6-8/sf.

We are still waiting to hear from the seller.I did a little work in looking up the name the seller and found that he was a drug dealer (meth) and the building had a lot of foot traffic.He was arrested and lost possession of the building, now belong to the city marshal. 

The wife has gotten into drugs. 

Thanks John, here is what I read that concerns me:"Texas law is clear that if a dependent administration is opened within four years after the death of the mortgagor, a foreclosure sale conducted in the interim between the mortgagor’s death and the opening of a dependent administration will be voided on the request of the dependent administrator to the probate court.

If they both want to sell, they could do so through probate via a deed out from the administrator directly to the buyer with a division of sales proceeds less creditor claims, etc. at a later date.

Source, I am a licensed multi-level administrator and currently oversee 5 buildings.  

A pre-ordinance (built before July 8, 1957) residential building or building of mixed residential occupancy, not complying with the requirements in force and applicable to the building at the time of its conversion, may be altered so as to legalize one dwelling unit, in addition to the number of dwelling units originally authorized, providing that said unit was determined by the office of the zoning administrator or the zoning board of appeals to have existed prior to July 8, 1957, and provided such building complies with the other provisions of this chapter.

AND What kind of person(s) want to live in a "Shed", (drug addicts, alcoholic Hobos, -- probably homeless street people).

There are also drug free zones that make the penalties really steep if you get caught around schools.

If they were dealing drugs and just got out three months ago, that's high risk.Everything you do is to evaluate the amount of risk they present.