I live in Brooklyn and used to work downtown by the Seaport. I was walking around near Wall Street one day and found a card shop. Mostly modern stuff but they did have some T206's and 33 Goudeys as well as 50's and 60's. As I recall prices were not too bad either. This was about 2.5 years ago.
I think this was the shop but I'm not positive...
http://chameleoncomics.com/