Can I upgrade the RAM of the MacBook Pro 13' Retina from 8gb to 16gb after/during purchase? - Quora
Apple Certified Used A Grade Macbook Pro 13.3-inch Laptop (Retina) 3.1Ghz Dual Core i7 (Early 2015) MF843LL/A 256 GB SSD 8 GB Memory 2560x1600 Display Mac OS X v10.12 Sierra Power Adapter -