For what it's worth, I had a full set, i.e. every one that was in the Public Relations Dept. "vault", for many, many years. More than 20 years ago, I decided to liquidate ALL my EMD/RR memorabilia (lithographs, operator manuals, service manuals, etc.). Concerning the lithographs, I couldn't get more than $20 each, and the last two years I gave the last of them away to various friends.
There were so many thousands of those lithographs produced, which EMD Public Relations regularly gave away to virtually ANYBODY who wrote in from the 1950s through the 1990s, I can't imagine that, even today, they are worth a lot of money (just my opinion from experience).
