Used Message Boards (Solar Tech and Addco Available) Shannon Andria · May 15, 2019 · Search for: Advanced Search Place Ad Browse Ads Search Ads Used Message Boards (Solar Tech and Addco Available) Click to enlarge image. Contact Information Contact Sean Koch Phone: 651-472-4147 Price: $1.00 More Information Used Changeable Message Signs for sale (Addco, Solar Tech). Please contact Sean Koch at skoch@streetsmartrental.com | 651.472.4147 for more information on availability and pricing. This Ad has been viewed 132 times.