Houses For Sale Reserve at Mallard Crossing subdivision Summerville SC. MLS real estate listings for sale in Reserve at Mallard Crossing Summerville SC by price, street, age, list date, bedrooms & more Reserve at Mallard Crossing Summerville SC. Currently, Reserve at Mallard Crossing in Summerville SC has a total of one listings on the local MLS for sale with an average price point of $389,000, the max being