CMS 16GB (1X16GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad X250 - C57 at Amazon.com
Lenovo Thinkpad X250 12.5" Ultrabook Business Laptop Computer, Intel Dual-Core i5-5300U Up to 2.9GHz, 8GB RAM, 256GB SSD, WiFi, Bluetooth, USB 3.0, Windows 10 Professional (Reused) - Walmart.com
Amazon.com: Lenovo ThinkPad X250 12.5in Laptop, Core i5-5300U 2.3GHz, 8GB Ram, 120GB SSD, Windows 10 Pro 64bit (Renewed)
Lenovo ThinkPad X250 - full specs, details and review
Amazon.com: Lenovo ThinkPad X250 20CM 12.5" Ultrabook, 8 GB RAM, 256 GB SSD, Intel HD Graphics 5500, Black (20CM0048US)
Amazon.com: Lenovo ThinkPad X250 12.5in Laptop, Core i5-5300U 2.3GHz, 8GB Ram, 120GB SSD, Windows 10 Pro 64bit (Renewed)