Let's Talk About Vacant Buildings

It's my understanding this building has been sitting empty for more than 3 years on the Plaza. I can see no real advertising to rent it? I see no For Sale sign on it? That being said, how is the Plaza supposed to bounce back if much of what is there is just sitting stagnant? I heard the owner of this building paid $310,000.00 and now wants $750,000.00 for the property, (down from $850,000.00). Pretty nice mark up and look how fast it's selling! What does the City Code say about these buildings just sitting around the City doing nothing? Should they come down like the old mall? Should we have a say in what happens to other people's investments?