I'm buying the Met

I inherited a small sum recently and am looking for investment opportunities. I have my eye on a choice property on New York’s Upper East side (it’s in the 80’s, on 5th Ave, west side).

Before calling real estate agents (how foolish would I feel if I were a couple of hundred bucks short of the asking price) I hoped you fine folks might help me to estimate. Please, what is the current market value of the Metropolitan Museum of Art (including the land, buildings and inventory).