It’s been a while since I setup my system, but as I recall they are interconnected via the smart hub, and do not need internet at all. When I first configured our system, IOT was probably the topic of an exploratory whitepaper and not yet reliant on internet. But times have changed! Give it a bit more searching; we’ve been happy for quite a long time with the devices. They even have plugs which you can convert dumb devices to a smart HA device—but you’ll have to get them on eBay because they’ve been discontinued:/
Caseta switches can handle 3-pole switches in exactly the way you’ve described. You could even set them up with dimmers, pico remotes (and eliminate one of the switches). If you get the wireless bridge (now known as Smart Hub) you might be able to tie it into your HA depending on your ecosystem.
I’ve linked you to the 20 meter band, which is pretty active 24/7. When it’s nighttime in the US, you can listen to Amateurs making international contacts. See some of my other posts in my history to get a visual on range.
Earasers for me. They have a selective band pass to let vocal frequencies through. Airplanes, concerts, monster truck shows you name it, I’ve used mine and can practically have a normal conversation.
I usually try to find myself on 20m. I like it's DX-ability at night and appreciate it's reach during the day. Otherwise 10m is nice because there's lots of new hams ready to answer CQ calls, or calling CQ themselves.
The person who answered my very first QSO made it extra special by sending me a first-contact certificate; went way above and beyond and I am incredibly thankful for it.
If you’re seeing them go for twice as much elsewhere, then it sounds like it might be a good deal. Bear in mind the old adage “if it sounds too good to be true, it probably is.”
It’s possible it’s being sold by someone who had high ideas of amateur radio and wants to rid themselves of a basically brand new radio.
It could be part of an estate sale and the seller did not do sufficient research.
It could be inoperable and the seller is not being forthcoming.
It could be stolen and someone is trying to fence it.
At the end of the day, you have to decide if $350 is worth the risk.
Rule 1 of politics: Answer the question you want, not the question you’re asked.