I was surfing around looking for pre-prime-day deals on Amazon, did a search for "Insteon" and noticed that several items are on sale. I just picked up a Hub for $57 (doesn't work with Indigo, but I like to play), and a few more switchlinks for $41 each.
Here are the links to the above, but as I mentioned there are several more deals if you do a search for "Insteon"
https://www.amazon.com/gp/product/B00VG5DB86
https://www.amazon.com/Insteon-SwitchLincRemote-Control-Switch-Dual-Band/dp/B008HUWWOC
Terry