They happen monthly. In May - September they are in a three level Union hall AND a huge parking lot. They boast 250 vendors.
If you are in or near Chicago, I highly recommend checking it out.
Here is what I bought.
I really love interesting jewelry. Especially anything having to do with fiber art.
I didn't "buy" this but it's great. As a camera nerd, I love this set up. You just smile, hit the button, and this super nice guy hands you your ticket to claim your prize; your photo. So clean and clever. They have a single fashion style soft flash that creates the most beautifully textured photos.
My mom and I both feel super dorky trying to act all dorky. So it's just a simple smile from us. :)
Some of what I saw.
Finally, He's my boy and Aunt Gail. My kids are going to be like 15 and ask how Gail is related to us. She totally isn't. It will blow their minds.