Wahib & Mireille Costandi purchased 603-607 South Knickerbocker Drive in Sunnyvale, CA, for $1.2 million or $319.83 per square foot. Built in 1970, the retail strip center includes 15 parking spaces. The buyers, who put approximately $100,000 of improvements into the property, will occupy the 3,752-square-foot building as Prudential California Realty. Derik Benson with BT Commercial Real Estate-NAI in San Jose represented the seller, Marina A. Koifman. The buyers were self-represented in the transaction. By: Carolyn Mitchell and Lawrence Kopp