Jake Voll posted on LinkedIn about an interesting tactic to sell systems. They hung door hangers saying “Switch to $19.95 Alarm Monitoring!” for homes that had existing security systems yard signs. Recipients then called into them, with Voll calling the program 'very successful'.
What do you think? Good idea?
You could perhaps apply it to video systems as well. See a Hikvision system "Switch to a video system not made by the Chinese government". Or see an Axis system "Switch to a video system that's 80% less", etc.
The general approach of seeing what customers already have and then targeting a pitch for them to call you back seems sensible to me.