CREATE the duplex of your dreams!  Whoever buys the parlor floor (a lovely one bedroom with four exposures, wood floors, and high ceilings) inherits the RIGHT to BUY the ground floor beneath (from the coop for a price determined by a formula that yields an attractive number).  Renovate and create your two bedroom, two bath duplex! PLUS:  for about fifty dollars a month, rent the back area and create the patio/garden you've always wanted.  Approx. one hundred sq. feet back there - and it's all yours!