Well you live in NYC, give it a try. I think you can do it, If anyone asks tell them you are doing an at work program, or you were in the neighborhood and wanted to see what they had for sale. (as a former NYer we have the skills
) I just don't think if you make it look like you belong that anyone is going to give you a hard time. my other suggestion was going to be try e bay. There always seems to be this stuff for sale there too, just make sure you check out the shipping fees.
be well,
-L