Page Six broke the news last Monday that Barack and Michelle Obama have been viewing an apartment at 10 Gracie Square, an exclusive, white-glove apartment building on the Upper East Side, situated at 84th Street and the FDR Drive. Sources now tell The Post that the couple are merely awaiting co-op board approval to purchase the unit — which is reportedly in the $8 million to $10 million range — in the 1931 enclave, whose residents have included designer Gloria Vanderbilt, exiled former first lady of China Madame Chiang Kai-shek, media mogul Steve Ross and socialite Brooke Astor.