I “think” you enjoy this… T61 (256 Gb SSD Debian 10, RAM 4 Gb) and E14 2021 (upgrade with RAM 16 Gb, 1 Tb M.2 for Windows 11 and 256 Gb SSD for Debian 11, all Crucial) : r/thinkpad
Lenovo ThinkPad T61 Core2 Duo T7300@2.0GHz 1GB RAM, No HDD/OS, w/Charger | eBay
Lenovo ThinkPad T61 Review | Trusted Reviews
Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
Lenovo Thinkpad T61 RAM Upgrade - YouTube
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
New! 4GB Module DDR2-667 SODIMM Laptop Memory PC2-5300 for Lenovo ThinkPad T61 at Amazon.com