Many older brick homes survive for a long time after settling, but if moisture is getting in through the bricks, you could be looking at repointing the buildings.  

That is one I'll want to think about taking care of as any moisture indoors is bad bad bad.I too have some concerns with my bathtub/shower.

don't be afraid to spend time on a ladder poking everything that has increased moisture deterioration risk.

The $2,000 or so it is going to cost is minor, when purchasing a property that is north of $1million.I personally wouldn't be as concerned about the mold, unless you know there are water/moisture issues.

Electrical wires are usually good unless it was exposed to moisture then it can be brittle.

However, the (outside) perimeter of these vents do need to be sealed well as a bad seal here allows water/moisture to infiltrate into the building envelope (insulation/framing/finishes).As to the ventilation fans/ducts going nowhere, that's a concern. this means hot moist air in the house is NOT getting out - a contributor or genesis of mold and other problems.Hope this helps!

It's full of mold, there's moisture in the walls, it's been there for months, she's made multiple complaints to us, we refuse to fix it, etc....She went as far as to call and make a complaint to the town health department.First off, NONE of that is the case.

The heating company boss (who got called down to our house by the contractor) deemed it so important to get replaced that he was pulling people from other jobs to get it done today.Needless to say my father-in-law is now a believer in my inspections (we also found a moisture problem in the bathroom causing the paint on the ceiling to peel that had never been reported by the tenants and fire alarms that were not functioning properly) and I'm so glad that I have a reserve fund!!

I am doing the easy things myself while subbing out the more technical items:electrical main panel and raising the mast to coderoofHVACAnd last but not least we may be ahving to raise the roof of the master bath and replacing the sill plate due to moisture penetration (I will assist in this since I am good following directions...well most of the time really)Drywall cause who really likes that anyways? 

Personal preference, but I wouldn't feel right selling the property with any sort of serious moisture/mold issue or rot that could be a fairly easy repair.