Hello Monte,
There were three more editions before the end with the 6th edition in 2007. You may want to contact William Cohenour who sells an un-illustrated price guide. He recently posted on the Strike Point.

http://www.thestrikepoint.com/index.cgi/page/1/md/read/id/1050558/sbj/catalog-pre-order/

Strike images may be seen at the link below.