https://www.lowes.com/pd/SYLVANIA…/999910805
These look like the cheapest Zigbee bulbs I could find for my home automation setup.
I found these at Lowes for $11.24 each. They are Zigbee compatible and easily connected to my Wink Hub. With my Wink setup, they are working great with Alexa.
It looks like that price is good until 1/18/17.