Another difficult location. You will need to do some testing to see what will work.
I have had good luck with a GE34792 Attic Antenna that was on sale (assembly required).
https://www.youtube.com/watch?v=1qYucg3JXzA
WBBM CBS will probably be too weak because it is on VHF channel 12; that antenna and mud flap antennas are better for UHF than VHF.
Sometimes the best indoor antenna is an outdoor antenna. This is in your price range:
http://www.solidsignal.com/pview.asp?p=hdb4x
the 2-bay model is cheaper, but has less gain:
http://www.solidsignal.com/pview.asp?p=hdb2x
But they don't cover CBS very well either.
No guarantee because indoor results are difficult to predict.