I have a small dumb TV I got fairly recently from Best Buy. It’s their store brand and has no smart features. Only 720p but they had some 1080p ones too. They’re nothing special but very cheap. Mine was an open box and I got it for maybe 40 or 50 dollars.
While I exclusively use Linux at home and I recommend it to everyone especially on desktop, they mentioned battery life and from my experience that isn’t its strong suit.