This co-op studio requires strong legs, most bucks

Living room, dining room, bedroom and kitchen of the priciest co-op of its size in New York.

First, you trudge up three full flights of stairs in one of two conjoined townhouses in the mid 60s off Fifth Avenue on Manhattan tony Upper East Side.  (Your neighbors in the other cooperatively linked townhouse are spared the hike since they alone have access to an elevator.)

Then you arrive, breathless, at an unusual  apartment that might measure 450 square feet, each of them exquisitely renovated.  The unit is so small that the bed has to be suspended close to the ceiling