mac - Can I upgrade the memory on late 2013 Retina MacBook Pro? - Ask Different
Apple MacBook Pro (15-inch, 2013) review: Apple's high-end laptop gets better battery life and a lower price - CNET
SSD Upgrades for 2013, 2014, and 2015 MacBook Pro
Got myself an MacBook Pro Late 2013 Retina! i7 with 8GB Ram! 256GB SSD. Battery is new, and 2 brand new in box magsafe chargers 60W!! For just 80 bucks!! How about
Amazon.com: Apple MacBook Pro 15in Retina Late 2013 i7 2.6GHz 16GB 512GB SSD OS X ME874LL/A (Renewed) : Electronics
Review: Apple's late-2013 13-inch MacBook Pro with Retina display | AppleInsider