Possible moisture issue, needs a clean up and encapsulated.

Cdx will delaminate if exposed to moisture. ( Leak, poor ventilation).

A licensed home inspector points out moisture, shows a recall for safety on the electrical panel and points out a broken beam.Yup disclose.

make sure piping is in order, they should check for any moisture under home or between walls.  

You could argue that you're worse off with an underlayment because it could add more "play" to the floors and work the locking mechanism loose.You might want an underlayment over concrete though or if you have a moisture problem but I doubt even in this case that it would make a significant difference.

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.