It makes sense that a group who trades in real estate data would know how to play the commercial real estate game. CoStar Group probably deserves some credit for this move, though: Jonathan O’Connell reports that the firm will sell its location at 1331 L Street NW — which they purchased last year for $41 million — for a whopping $101 million to a German firm, notching “the most profitable flip of commercial real estate in Washington” since the beginning of the recession. (No word on whether the deal will still allow the new owners to purchase the Cleveland Browns.) On the plus side: according to Mike DeBonis, the completion of the deal will apparently bring in $1.5 million to the city coffers. On the other hand, the sale of the property for more than twice what CoStar paid does sort make one wonder why the Council didn’t think to ask about such a potential profit when they awarded the company a ten-year, $6.1 million tax abatement.