Most all the major NYC camera dealers offer grey market merchandise. Nothing unethical about that. It's pointed out to most buyers that the cheaper price comes with a much more limited warranty. That's the tradeoff...

Still, sounds like Broadway may not have made that clear to you, and that kind of stinks.

Reputable dealers like B&H make it very clear that their grey market gear has no US warranty, and they replace that with a version of their own...