I just won an auction on ebay for this (with a very good price):
It's a Thinkpad x230t, the convertible version of the normal x230 with an active digitizer under the screen. Lenovo discontinued the t-models after this one and their new consumer grade convertibles are no match for the build quality and versatility of the old ones. It not quite as sturdy as my old x200t was but it'll take a lot more abuse than current models.
With 12GB of ram and a 275GB SSD, there's no urgent need to upgrade (though there's still room for an mSATA SSD). The CPU's a bit old but it's a 35W model (Sandy Bridge i5, don't know what exact model, it should have 2.5-2.9GHz base and 3.1-3.6GHz Turbo) and still plenty enough for most things. This config. would have cost ~1800-2000€ in 2013 and I just paid 350€ (including a fresh battery & a docking station)
I'll only be acquiring it for a few days until I hand it over to my brother as a workhorse for his new job as chef de cuisine, there is probably some rough treatment and a hot and humid environment in it's future.
The only more rugged options (e.g. Panasonic Toughbook, Dell Latitude Rugged) would be a lot more expensive, cumbersome and less capable.
I fairly happy with my own t440s (I replaced the trackpad with the one for the t450s of course, the buttonless one was just [expletive deleted] unacceptable) but I miss the build quality and easy maintenance of the old Thinkpads. The hot-swappable battery that they introduced with the x*40/t*40 series is great (though those morons have phased it out of the t4*0s line again) but other than that I want to go back to the time when Laptops didn't need to be thin and shiny.
I'd happily add ~1cm to the thickness of my T440s if that space was filled with thicker/more sturdy materials and extra battery...