55 ILCS 5/3-6026: No purchase of property at own sale.

No sheriff or deputy sheriff shall become the purchaser, nor procure any other person to become the purchaser for him or her, of any property, real or personal, by him or her exposed to sale, by virtue of any judgment or process; and all such purchases made by any sheriff or deputy sheriff, or by any other person in his or her behalf, shall be absolutely null and void.