I'd prefer a place somewhere in the eastern half of MA, but I'll take what I can get.
It's not around the corner from the eastern half of MA,
but it's "do-able: drive or take a train to NYC. There are
a few stores there stocking some pretty high end headphones.
For example B&H on 9th Ave. and West 34th Street. You can
call them to confirm they have the item you want in stock, and
pay for it with a credit card so as to be sure it's waiting there for you
when you arrive.
(BTW, headphones are not their main business - cameras and lenses are.)
A couple of other suggestions - businesses which run "offices"; i.e. you can
rent an office on a month to month basis, and then they have a menu of services.
They'll answer your phone for you if you pay for that "a la carte" service. If you
don't need it, don't use it and there's no charge for it.
More importantly, they will receive packages for you and hold them for you -
they will also forward them to an address you specify. So, if there is such
a place (it seems more are opening every day) reasonably close to you,
you can have the items you buy shipped there rather than to your home.
Also, there might be a store or other retail business near you.
Perhaps one where you're already a customer - a pharmacy, or
a small grocery perhaps. They might be willing to accept a package
on your behalf from time to time. And you'll avoid all of the issues
you mentioned in your post. Presumably, you can then shop online
to your heart's content and simply give the business's address as
the (your) receiving address.