can amazon ship to a post office?

[good question, sir]

can they just ship small things there
can they ship big things like a boat there?
can they ship to a post office at all?

[Mark]

call them

[Nicholas]

Yes, small things can be shipped there. The majority of sellers (including myself) use USPS instead of the alternatives of FedEx or UPS, unless it's a fairly expensive item and/or the buyer wants it sooner. As for boats, as in actual thousand pound boats, you cannot ship them through the post office.