Ryan Carlsten » Real Estate Appraisers Go back to directory. Ryan Carlsten JC Valuation Services, Inc. P.O. Box 4474 Mankato MN 56002 work Work Phone: 507-456-7930work Personal Email: rcarlsten18@gmail.comINTERNET Categories: Affiliates, Appraisers, REALTORS Updated 5 years ago.