When sourcing used laptops, you must prioritize Battery Health (should be above 80% of original capacity) and Screen Quality (check for white spots, dead pixels, or pressure marks). Ensure the CPU generation aligns with modern software requirements (e.g., Intel 8th Gen or newer for Windows 11 compatibility). Additionally, verify the keyboard layout, as Japanese units often feature a JIS layout which differs from the standard US QWERTY; confirm if the supplier can provide English keyboard stickers or replacement keys.