We can debate the exact length copyright should be (I favor 25 years), but that is the real question. If the copyright is expired, then you can, if not you cannot. I don't care if the artist is living or dead. A dead artist may have heirs (kids, wife...) that they expected to still be supporting except they happened to die.

Yes. Your prints are inherently valuable, as is their distribution.

To be clear, you should not be able to profit from claiming original authorship of those works: that would be fraud.