I believe you are asking to buy a condo in a high rise? Preferring over the 70th floor? There is not to many buildings that offer that in chicago. I have been seeing a lot of good deals in the Hancock and they got a few available on the 70th+ floor. I would contact a buyers agent to help you look for this. You will get their expert advise on what buildings are best, and you get to use their services for free. Id be happy to help.
Americorp Real Estate
Brokers Associate, e-PRO