sheldon nadelman , 80 , captured images of new yorkers while working at terminal bar on 41st street and 8th ave .
photos between 1973 and 1982 show prostitutes , pimps and homeless people around port authority bus terminal .
sex workers would come in to drink cognac at eight in the morning before going out to walk the streets .
terminal bar closed when owner did n't want to pay $ 125,000 a year rent on property that now leases for millions .
block with bar in neighborhood described as ` dirtiest , wildest and toughest ' now has an upscale grocery store .