Trying to find how to find value of famous intaglio printing plate, please help.?

I own a old intaglio printing plate. This on is on what I believe to be zinc, as I have read they are likely done on zinc or copper, this is silver in color. The plate on mounted on a wooden backing that would likely fit into the press. It is old. Not sure of actual age. Looking at reproduction print this has every detail engraved, down to blades of gr. It is a engraving of "American Homestead In Spring" etched under picture. "Published by Currier and Ives" etched under picture."152 Nau St. New York" etched under picture.And in fine print, best I can read with a magnifying gl "Entered according to Act of Congress AD 1869, by Currier & Ives, In the District Court of the United States, for the Southern District New York". I am wondering how I would find a value of this and who or what type of collectors would be interested in this type of piece. I can find a ton of things on line with this particular print but none of the actual plates used to make the older ones of this print or any others.I can not find this type of plate on line for sale or view or anything. If you know a direction to go that would be great. Thanks you for reading my long winded question.