Leave it to a tony Buckhead high-rise that's setting square-footage sales records to dominate the list of Atlanta's top 2015 sales, too. Despite the fact that they're condos, and not estates with manicured acreage, a whopping six Residences at the St. Regis Atlanta units have ranked in the top 20 biggest sales of the year across metro Atlanta. According to the Atlanta Business Chronicle, other mega-sales ranged from a $6-million Atlanta estate on four acres to an expansive property in Suwanee. At last check, just seven of the St. Regis' original 43 condos remained unsold. Recent transactions included a $4 million purchase of one gargantuan unit that was nothing but a shell.