Well, unless there is a really good/cheap shop in NYC I think you'll struggle to find any real bargains as such 🙁
I was out in the US in July and visited several bike shops during my tour round and ended up buying nothing because the prices were no better than CRC 😐 And in a couple of cases actually more expensive, like the green XO cassette I was after!!!
I think for the best deal you have to look at the US versions of CRC and Wiggle, then have it delivered to your hotel or something.
Strange how you expect cheap kit when being abroad, I do it all the time, went to Japan and Korea 4 weeks ago and wanted to hunt down some good bike shops etc. Found a couple and they were much more expensive than CRC 😥
I think there are some good deals to be had in the US but it's not easy to find, good luck.