Could be leakage, clogged, dirty filters, and electrical (not triggering the condenser hence the refrigerant isn't empty) as well, but inspection should've picked that up.

I had a tenant bring in a large dog that peed on the air conditioner outside and peed a large hole through the condenser.

I have seen a few central AC outside condenser units to be missing with lines cut.

If your not a real estate agent with access to the MLS this might be a good tool for you as it condenses the information into one website, however websites like zillow do it for free.4.)

If your interested I made a summary of it to condense it a bit and give some insight.

By the way the equipment (furnace, coil, condenser) will cost YOU somewhere around $1800 - $2400 depending on the house size.It will cost one of these shops far less than that, but of course, they will when asked say it's $3000 + worth of equipment.  

There would be one or two air handlers and condensers.  

I don't focus as much on crime because criminals have cars to and drive to the good areas to steal ac condensers also. 

No condensation, a genuine question as many don't actually know. 

Usually, only heating oil USTs associated with commercial properties are regulated. thus, most home heating oil tanks may and often are taken out of service without any oversight from state regulators.Second- the rules that are in effect for heating oil tanks are usually less stringent than for diesel or gasoline tanks since heating oil tends to thicker and may not migrate as far. as a result, many states just require tanks to be cleaned out. they may also require the tanks to be filled with sand or concrete to prevent collapse. but sampling may not be required.Third- the key to determining if a tank has leaked is to collect soil samples from around and beneath the tank (groundwater also if groundwater is shallow). another quick way to see if a tank is leaking is to "dip" it with a stick that has a paste that turns color in the presence of water. generally, if water has gotten into a tank, it can mean oil has leaked out of the tank (although a certain amount of condensation may be present even where there is no leak so this is not a infallible test).Fourth- if there is currently a tank in the basement, ask the owner if there used to be a buried tank (a/k/a underground storage tank).Fifth, If the tank has impacted the soil, the cleanup generally varies from $25K to $50K though the costs will depend ont he depth of the contamination. i once had a home with a heated pool that had pressurized piping and used diesel. the contamination went down 40 feet and the consultant went crazy excavating the soil to the tune of $400K!!!