A couple of months ago, I bought a used Thinkpad X200t in excellent condition. I knew about the popularity of the older Thinkpads and libreboot, and I was interested in a tablet pc because I wanted to use it to read and make notes, so when I came across that X200t (in excellent condition and good price) it was an easy decision to buy it.

Its specs are low (256GB SSD, Core 2 duo, 4GB RAM, 1280x1024 screen), but I find it very usable for browsing, reading and annotating pdfs. It runs Debian stable with KDE Plasma (the pen works well with krita, okular, xournal). The battery is old but is still holding a charge for several hours. I thought the screen would be annoyingly small, but I noticed that it is actually just fine for most web pages. I like the old 1280x1024 a lot more than the nowadays popular 1366x768. I really like it, it's also small and easy to travel with.

What you can do with it, is however limited by the Core 2 Duo chip, and the amount of ram. It's not gonna run a heavy IDE, and as a developer that's a bit of a pity, but was also completely expected.

I just checked how much people ask for old Thinkpads X200 and X200t and they really ask a lot for them, especially for ones that are already librebooted. That's amazing if you realize that those came out in 2008.