 Brookfield Asset Management Inc. said Monday that it has offered to buy all the limited partnership units of Brookfield Property Partners LP that it does not already own for 16.50 per unit, or 5.9 billion in total. Unitholders can elect to receive 16.50 in cash per each BPY unit, 0.40 Brookfield Class A shares or 0.66 of BPY preferred units with a liquidation preference of 25 per unit. 