The Kinderhook Plates are a tell-tale sign bearing witness against the LDS church. Have you ever wondered what it must have been like to live in the city Joseph Smith created in the mid-1840s — from a non-LDS perspective? Now online are PDF documents from the Nauvoo Neighbor, from 1843-1845.
In browsing through one of the issues, I noted that Sidney Rigdon was the town's postmaster, and that one could buy a facsimile of the famed Kinderhook Plates via the mail (in the January 3, 1844 issue, on page 3 of the PDF.)
Fascinating stuff.
For more information, see The Mormon Mirage 3rd Edition: A Former Member Looks at the Mormon Church Today (Zondervan, 2009). Also available as an audiobook and as an expanded-text E-book for Nook, Kindle and other reading devices.
