Clarkson, William P. CCIM: Search Land Commercial Investment Real Estate AZ CCIM William P Clarkson CCIM Certified Commercial Investment Member AZ Scottsdale Phoenix Paradise Valley Rio Verde Cave Creek Sedona Maricopa real estate AZ realtor AZ agent home realty sale realtors homes multiple listing property listings mls search properties agents sales news communities brokers first time loopnet costar commercial investment specialistScottsdale, Phoenix, Paradise Valley, Rio Verde, Cave Creek and Sedona AZ real estate, homes for sale, & MLS property listings. AZ realtor agent.