Cheap Zigbee hub

I recently purchased a Zigbee light switch and a wink hub v1. However the wink hub v1 is a piece of crap and I would rather use openhab to connect the switch to IFTTT. What’s the cheapest dongle I could get? Amazon, with prime shipping preferred but not required. Must be for Raspi

A proper search should get you the big ZigBee thread with a couple of recommendations.