Saw on Facebook last night that season passes (usually $100 for adults) are on sale for $85.
Here is the info on obtaining them:
Season passes are only sold through the Faire office, not online, since they get mailed to you- the Season Passes can't be printed online as of yet. You need to call 847-395-7773 ext. 100 and talk to someone in the office or leave a message and they will call you back.
I don't know how long this is good for, but even though we only go on Sundays and Labor Day Monday, it still is a good deal for us.