During some my house clearings I have encountered Haunted Objects in particular Mirrors. Mirrors act like portals to other dimensions and spirit can hide inside them, in particular, darker low vibrational energies.
If the mirror is from a house that has encountered paranormal activity it can get passed onto the person whom buys it as those energies can hide in that portal then start to create chaos in the house and to the people in that house. This can be anything from creating fear, illness or depression. Personally I keep mirrors out of my sleeping area and never place two mirrors facing each other.
Please be aware of the items you buy second hand or inherit, they can hold energies, some are not pleasant and can be destructive.