I just had inspection done on a house to buy, it seems the guy moved the stair case at one time but did not support it properly. It is 1947 1-1/2 story with attic/bedroom. In the attic the floor has dips down quiet a bit pm pne site. Overall the house looks fine, i only noticed these things today. The inspection guy assures me i fix it for $3k paid to a professional carpenter and it will fixed! Needless to say i'm a bit sceptical/worried.