Dont try the goodwill stores in the city. They are quite the disappointment for camera gear. I have a feeling they shuttle off their gear to the online site they have.
If you will visit 42nd St, which you probably will. The main Nypl branch has a nice free show going on called photography and ruin, show casing various prints revolving around the theme of decay and the passage of time.
Across the street is also the ICP which is doing a cool show on Weegee and also had a small section downstairs dedicated to the newly printed book on magnum contact sheet prints. $12 is admission.
I had the chance to visit both earlier this week as an errand brought me to the area and I had 2 hrs to spare.