[contentcards url=”https://www.costar.com/article/642008108/one-of-st-louis-tallest-office-towers-empty-for-years-sells-for-less-than-2-of-its-peak-price”] Goldman Group Buys 44-Story Former AT&T Office Tower for $3.6 Million By Mark Heschmeyer In the latest sign of how lower demand is hitting…