Is the value of a painting in the canvas or the tubes of paint? Is the value of a sculpture measured in the density of the marble?
What or how something is made doesn't really effect it's value in the art world. That's one of the main things that separates art from craft. Crafts are valued based on how difficult or expensive it was to make them. Art is valued on significance.
Andreas Gursky, whose prints are among the most valuable ever made, are typically made from inkjet printers and heavily digitally manipulated. Galleries, museums, and most art critics seem to have no problem with that. What maters to them is the significance of his work.
Now, all of that being said, if you're just a guy on side of the street selling photos out of the back of your van, you'll likely get a higher price for wet prints than inkjet prints. In that situation, you're selling a product that the average person no longer has access to. Anyone can download a stock photo and print it at home. Most people don't know of a way to get a silver gelatin print, even if they really wanted one. It's also the reason why inkjet prints made on metal, glass, canvas, or very large inkjet prints tend to command a better price than a typical 8x10. They're things that the average person probably doesn't know where to get on their own (though could probably find on the internet with a little investigation).
In the end, value is all about supply and demand. A rare photo from a major artist has a LOT of demand, regardless of how it was made. A small inkjet made by your neighbor, probably doesn't have much demand.