Over the years, many great pedigrees have been forgotten or stripped from coins as they reappear for sale. If you were a collector, wouldn't you like to know that your anonymous new purchase was once part of the Eliasberg, Norweb, or other great collection? Here's an example:
This 1810 Half Cent was sold in the Goldbergs 6/2005 sale (Lot 14) without a pedigree. It reappeared as Lot 135 in their 2/2018 sale, there pedigreed to the Green Tree Collection. The coin plate-matches perfectly to the Eliasberg Collection, thus yielding the following pedigree:
M.A. Brown Collection - S.H. & H. Chapman 4/1897:1005, $3 - John M. Clapp Collection - John H. Clapp Collection, sold intact in 1942 - Louis E. Eliasberg, Sr. Collection - Bowers & Merena 5/1996:434, $3,080 - Goldbergs 6/2005:14, $4,485 - Green Tree Collection - Goldbergs 2/2018:135, $4,465
I'm betting that the new owner of this coin would be thrilled to learn of the expanded pedigree. Wouldn't you?
Good luck in your new venture! Very few are as qualified as Ron Guth.