It is illegal to scan a print, or to use that scan for placing on non-digital objects or products.
It is illegal to post other people’s art on sites that sell prints such as photobucket or deviant art.
It is illegal to create galleries posing as the creator of the artwork or posing as the actual artist.
It is illegal to attempt to artistically or digitally reproduce the imagery of another artist’s work for the purpose of selling prints. Any image based off another artist’s artwork is considered a derivative work of art. Works may be created for educational purposes, their originals may be sold, but to sell prints of that derivative work of art is a violation of the original artist’s rights. It is also illegal to claim first rights to that image. Although image content is protected, the concept of a work of art is not, so long as the new image does not resemble the inspiring artist’s work.