Lenovo IBM ThinkPad X60 Intel Core Duo 1.83GHz 512 MB RAM 250GB HDD | eBay
Arch Memory 2GB 200-Pin DDR2 667 MHz So-dimm RAM for Lenovo ThinkPad X60 Tablet 6367 Series at Amazon.com
Thinkpad X60 I saved when it was being thrown away. Put in a spare SSD and some RAM and built Gentoo with moderate optimisations. Runs quite nicely! : r/Gentoo