If you have a C & R license you should know the laws. The C & R license (FFL03) is a federal license that applies to interstate transactions. It does not apply to intrastate; that is, within a state; I'm in Maryland-- for a purchase in Maryland, I still have to abide by Maryland laws, i.e. 7 days wait, paperwork, approved gun lists, etc.
You still have to abide by NYS laws for purchases within NYS as I do for purchases within Maryland. That's why I purchase all my C & R guns online from non-Maryland licensees or go to Pa, Va, Del. etc.
As well, dealers have no obligation to honor a FFL03. Many claim ignorance to avoid having to deal with it.
Steve Bonning, PA-C
Licensed Collector of Curios & Relics
Maryland Designated Collector