A-Tech 8GB Module for Lenovo ThinkPad X250 Laptop & Notebook Compatible DDR3/DDR3L PC3-12800 1600Mhz Memory Ram (ATMS350735B12351X1) 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
Lenovo ThinkPad X250 | i5-5300U@2.3Ghz | 8GB RAM | No HDD | w/ AC Adapter • TechRenew
Refurbished: 2020 Lenovo Thinkpad X250 12.5 Inch Business Laptop, Intel Dual-Core i5-5200U up to 2.7 GHz, Intel HD 5500, 8GB DDR3 RAM, 512GB SSD, FP Reader, WiFi, Windows 10 Pro (Renewed) - Newegg.com