Thinkpad X230 here, IPS version, used ones are laughably cheap (Central/Eastern Europe).
Battery, ram (two slots), keyboard, hdd are very easy to replace, everything works perfectly with linux (except bluetooth, but that's always problematic).
On the downside the speaker and the touchpad are crap, so it's your call. I got a Macbook Air in case I gotta work on a project where osx is a must, but fortunately I haven't touched that fancy paper weight for two years now.