Penthouse buy and hold condo for Sale. Purchased 2 years ago and already has appreciated ~15%. Buy it for a rental or buy it for your personal. It's really one of a kind. 

Appraised for 505k last October and Redfin estimate is 525k. 

Link to listing: https://www.redfin.com/IL/Chicago/50-E-26th-St-60616/unit-403/home/12674062