Gopher at University of Chicago Library
url is: gopher://gopher.uic.edu/00/library/libdb//landsale. This site allows searching on name, date, and county. There is, however, limited access, and the data may not remain.

Illinois State Archives
The Archives has published the records on microfiche. There may be possibilities of 9-track tape, but see below. The contact for all information on the records is:
Illinois State Archives
Archives Building
Springfield, Illinois 62756
contact person: Bob Bailey
phone: (217) 782-3674
Illinois State Museum
Derived information (posters, papers, and exhibits)

URL =

https://www.museum.state.il.us/

In the future? Searching, perhaps download.