Yeah, it's kind of like that show American Pickers. A couple hundred square feet stocked full of completely random toys, some loose, some carded. There's an absolutely incredible selection there. There was a Terror Drome for sale that had seen better days, but was nonetheless tempting. Hundreds of loose figures, so you have to dig through them to find something. I do wish I'd have asked how much this MOTU Slime Pit with box was now, since I've been thinking about it ever since.
There weren't many complete ARAH figures. I was kind of disappointed about that. I bought Duke, Lift Ticket, and Modulok there, and IIRC, Duke was probably the only 100% complete ARAH figure in the store at that time. It was better the last time I was there, about a year ago. I'm sure the stock changes all the time.
And the owner is really cool; willing to deal. And the prices on things were fair for everybody. I recommend checking it out when/if you're in Chicago.