Beware of hidden water signs

When I am searching to buy a new home, what are the signs that the basement may have a water issue? 
The picture above shows a freshly painted basement floor and wall. Believe it or not this is a sign that you need to investigate further.  The bottom of a cinder block wall will start to show discoloration, paint peeling or efflorescence (is a crystalline deposit of salts that can form when water is present in or on cinder block, brick, concrete, stone, stucco or other building surfaces).  Hydrostatic pressure (The force of water moving up or sideways)  is the cause of the water being present in the cinderblock and the longer it goes without being remedied the better chance of water entering the basement.