Timetec 16GB KIT(2x8GB) Compatible for Apple Late 2015 iMac (27-inch w/ Retina 5K Display)
Surprise! iFixit says you can't do much to fix or upgrade the 2015 MacBook | Ars Technica
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
Logic Board for 2015 Apple MacBook Pro Retina i7 16GB, A1398
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
Refurbished: Apple MacBook Pro Retina Display 15-inch 2.2 GHz Core i7 (I7-4770HQ) 16GB RAM 512GB SSD Storage Intel Iris 5200 Pro Widescreen 2880x1800 Mid-2015 A1298 MJLQ2LL/A - Newegg.com
Refurbished 2015 Apple MacBook Pro Core i7 2.8 15" 16GB RAM 2TB SSD
MacBook Pro (Retina, 13-inch, Early 2015) Won't turn on. | MacRumors Forums
Today got this Mid 2015 MacBook Pro 15" Retina , i7@ 2.2GHz, 16gb Ram, 256SSD... ( Not dual gpu ) For $300... Good stuff.... right ? : r/LukeMianiYouTube
MacBook Pro: How to remove or install memory - Apple Support
Apple: MacBook Pro 15'' Retina Mid-2015: Upgrade RAM to 32Gb - YouTube