4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Apple MacBook 13.3" 2.1GHz Core 2 Duo 4,1 MB402LL/A (Genuine A-Tech Brand) at Amazon.com
Apple | Computers, Laptops & Parts | Apple Apple Macbook A181 21ghz 1gb Laptop Osx White Mac Works | Poshmark
Refurbished 16-inch MacBook Pro Apple M1 Max Chip with 10‑Core CPU and 32‑Core GPU - Space Gray - Apple
MacBook Memory for Model 2.1 | DDR2 667MHz | Mid 2007 | MacMemory.com