CMS 8GB (2X4GB) DDR3 8500 1066MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad X201 3249-Xxx; 3626-Xxx; 3680-Xxx - A35 at Amazon.com
LENOVO THINKPAD X201 laptop, Intel i5, 4GB RAM, 128GB SSD, Windows 10 £59.99 - PicClick UK
X201, I think from about 2010 or 2011. It's a little slow, but with the ssd, 8gb ram (instead of 4) and running Linux Mint, it sure isn't bad for a 10+
Arch Memory 4GB 204-Pin DDR3 1333 MHz So-dimm RAM for Lenovo ThinkPad X201 362611U at Amazon.com