When Dazzlingdominika (Ghostzapper) won a May 13 maiden special weight race at Churchill her connections were ready to pounce. The 2-year-old filly had become a hot commodity and they wanted to cash in. In year's past that would have meant selling her privately or waiting for the next horses of racing age sale on the calendar. Instead, she will be sold Thursday by Fasig-Tipton in a one-horse digital, "flash sale," a new means of selling horses that promises to make it easier for those looking to move horses fast. "This...