Apple MacBook Pro 15.4" Pre-Owned 2015 (MJLT2LL/A) Intel Core i7 2.5GHz 512GB SSD, 16GB RAM Silver A1398 - Best Buy
Amazon.com: Apple MacBook Pro (15-Inch, 16GB RAM, 256GB Storage, 2.2GHz Intel Core i7) - Space Gray (Previous Model) : Electronics
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
SOLVED: Is it possible to upgrade the MacBook Pro 13" (Early 2015) as a whole - MacBook Pro 13" Retina Display Early 2015 - iFixit
MacBook Pro with Retina display review (13-inch, 2015) | Engadget
Apple MacBook Pro (15-inch, 2015) review: Old-school MacBook Pro is good for the dongle averse - CNET
MacBook Pro with Retina display review (13-inch, 2015) | Engadget
Amazon.com: 2015 Apple MacBook Pro with intel I7 (15-inch, 16GB RAM, 256GB SSD)- Silver (Renewed) : Electronics
16GB Memory Upgrade for MacBook Pro, iMac, and Mac mini
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Apple MacBook Pro with Retina Display (13-inch, 2015) review: Apple's 2015 MacBook Pro is still around for those who want fewer dongles - CNET
Apple MacBook Pro: RAM upgrade (HowTo)
How to upgrade Apple MacBook Pro RAM - YouTube
MacBook Air Storage Upgrade from 128GB to 1TB NVMe SSD (Early 2015, Without losing data) - YouTube
MacBook Pro 13" Retina 2.9GHz Logic Board, 16GB, Early 2015 - 661-02357
Install 16GB RAM Upgrade on Macbook Pro 15" in under 5 minutes - YouTube