Here is a fantastic resource on Marx Trains. It is ALL HERE. This book gives you prices and dates for everything. New Marx 1992-96. This one is a fantastic resource--so much information in one place.
Greenbergs Guide to Lionel Trains 1945-1969 Volume VII Selected Variations Book
Greenbergs Guide to Lionel Trains 1945-1969 Uncatalogued Sets Vol 4 Book Ambrose
Greenbergs Guide to Lionel Trains 1945 - 1969 Volume 5 Rare Unusual Book
Greenbergs Guide to Lionel Trains 1945 - 1969 Volume 5 Rare Unusual
Greenbergs Guide to Lionel Trains 1945-1969 Volume VII Selected Variations