Recommendations for low cost, UL listed power outlets?

So, I’m searching for power outlets for my OpenHAB project and wanted to ask for recommendations on hardware you’ve had success with. I’m not currently invested in any brands, so I’m open to anything.

I’m looking for…

  • Plug-in kind, not hardwired
  • Low-ish cost…around $10-$15 per outlet. $40/per feels a little overboard
  • UL / ETL Listed (cuts out the Sonoff items, unfortunately)
  • OpenHAB compatible

I’m cool with tinkering and programming (i.e. using ESP8266 / MQTT based devices).

Thanks in advance for any recommendations!