So, 601W Companies who owns the Old Post Office bought the parking lot on Clinton between Harrison and Congress - just to the west of the Holiday Inn which is across from Old Post Office. They bought this for $10M on 12/5.
https://www.google.com/maps/place/52...!4d-87.6404979
I know that Old Post Office had the option for other land when they pitched to Amaon, but were they going to purchase it no matter if they had a potential client or not?