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
4GB 2X2GB RAM Memory for Lenovo ThinkPad X Series X60 ( Type 1706 ) Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-4200 533MHz Upgrade System Specific Memory - Newegg.com
Lenovo ThinkPad X60 Tablet 6366 - 12.1 - Core Duo L2400 - Win XP Tablet PC - 1 GB RAM - 80 GB HDD - CNET