Hysan Development has received an encouraging response to the sale of its 62-apartment Broadwood Park development in Happy Valley. The company said the remaining nine vacant units in the development were put on the market and sold within a week. Buyers then became interested in remaining units with tenancy which were also sold swiftly in a similar price range, it said. The units, at more than 2,900 square feet each, were sold at prices ranging from $5,000 to $5,700 per square foot. The company expected the sales, and others concluded earlier this year, to generate $900 million in revenue.