Now usually those kinds of things impact the electronics vs the motors, but its still possible.Before I accepted that I owed money to my tenant, I would make darn sure that hey werent just trying to get a new washer and dryer from me.

Only thing I do with air conditioners or roof top units is belts, motors, filters and the odd cleaning of an igniter.

My mentors and my masterminds across this country hope that the new government will be able to get rid of the muck in the Dodd Frank Act, especially the really mucky stuff that has to do with seller finance, and finance of motor homes, mobile homes, and boats, etc.

I have bad luck with those going out almost yearly, flame eye sensors quitting, and the circulation motors every 2-3 years ($600) depending the brand.I do maintenance on 4 different boiler systems at a few of the wineries here in Napa (some for water heating and some for space heating).  

Am hands on and pretty much a brick  and motor investor. 

On the street in the past 5 years, most of the calls are suspicious behavior, noise complaints, etc with a few motor vehicle burglaries and one auto theft.

I would start from the outside first, as Account Closed is right, if the sump pit is the enclosed type the sell and not perforated all around it, then there is always water sitting at the bottom of the pit, and all sump pumps are not designed to get every bit of water out, the intake for the water is usually about 3/8" up from the bottom of the unit, this prevent the motor from being clogged with mud.a lot of times the home inspectors will exaggerate things for their clients.

I did consider Reno NV due to Tesla Motors Gigabyte factory hype but numbers don't make sense.Good Luck Vivek

Granted I've seen A/C units last 30 years or more, but typically you will be spending a lot of money on maintenance and burned out motors, etc etc...You will eventually have to pay for these units one way or the other.

A motorized scooter, sold it on craigslist for $350Washer / Dryer set (twice actually), sold them on craigslist for $200 (twice)A snowblower in need of rehab, craigslist for $200All things considered though, the trash far exceeds the treasure.Rick