This is an interesting post from The Verge where they are seeing used HomePods more expensive than when they were new. As someone that uses two of them as a stereo pair for our home entertainment system it’s not a surprise.
I use them for music, games consoles and movies – they sound great. I don’t want anything Amazon or Google as a smart speaker for this service and if you’re into a privacy focussed smart speaker that links into AirPlay you’re out of luck. If one of ours broke I’d be heading straight to the used market too.