TP-Link Kasa Smart Wi-Fi Dimmer Light Switch - Dim Lighting from Anywhere, Easy In-Wall Installation (Single-Pole), No Hub Required. Works With Alexa and Google Assistant (HS220) - $47.99 Amazon Prime Members (20% Discount Applies at Checkout).
Lowest I have seen for this newer (HS220) "Dimming" version switch.
CONTROL FROM ANYWHERE - Turn electronics on or off from anywhere with your smartphone using the Kasa app (Compatible w/ Android & iOS)
VOICE CONTROL - Works with Amazon Alexa, Google Assistant and Microsoft Cortana supported devices for a hands-free experience
GENTLE OFF - Tailor your lighting to fade on with a click of the switch or a double-click to gently fade off the lights while your child drifts off to sleep
SCHEDULING - Use Schedules to set your Smart Switch to automatically turn on and off while you're home or away