Only one subsale so far this year has resulted in a loss - of $167,000 Increases in property prices on Sentosa Cove, especially since the start of this year, have buoyed gains from subsale deals in the location. The average gain per unit from subsales of condos in the upscale waterfront housing district from January to April this year has almost doubled to about $1.4 million from about $762,000 in Q1...