Property Listings:

Real Estate Research Corporation - http://www.rerc.com/
Chicago, IL based valuation and consulting firm; find out about appraisal, investment analysis, environmental assessment, and research services.

Horizon Consulting Inc. - http://www.horizon-inc.com/
Provides quality control and real estate management services to government agencies and the private sector.

National Inspection Services - http://www.nationalinspection.net
Residential, commercial, and environmental inspections provided nationwide through network of offices.