Buchanan Street Partners closed 2018 on a high note, completing one of the largest apartment transactions of the year in Colorado. The Newport Beach-based real estate in­vestment management firm paid $72.5 mil­lion for Creekside at Palmer Park, a 328-unit complex five miles east of dow­town Colorado Springs. The deal went for about $221,000 per unit. By total price, it was the largest sale of the year in that city, according to the buyer.