As one of its daily deals, Woot offers the Leviton Z-Wave Enabled Appliance Module in White, model no. DZPA1-1BW, for $27.99 plus $5 for shipping. That's the lowest total price we could find by $2. It's designed for household lighting and motor systems and is compatible with Z-wave hubs, security systems, automation systems, and Alexa-enabled devices.