Old Acer C720
I have an old Acer C720 which I picked up for £179 about 5 years ago. It's still working really well and I've run Linux on it from time to time after upgrading the m.2 ssd to 128GB - which was very easy to do.
If it dies, I can't really see myself buying another as they've all got soldered in EMMC's these days, unless you fork out an absurd sum for a high-end Chromebook - which I really don't see the point of unless money is no object.
For all its open source origins, it's all getting a bit locked down on the hardware side, and I wonder if the security chips on the new pixels will kill off rooting devices completely?