4GB Team High Performance Memory RAM Upgrade Single Stick For Lenovo ThinkPad T510 Series W500 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
Restored Lenovo Black 15.6" ThinkPad T510 Laptop PC with Intel Core i5-520M Processor, 4GB Memory, 320GB Hard Drive and Windows 10 Pro (Refurbished) - Walmart.com
Lenovo ThinkPad T510 specifications
My very first Thinkpad, an upgraded t510 for 81€, including shipping : r/ thinkpad