OWC SSD Upgrade Kits for 21.5-Inch iMac (2013 - 2019)
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
Amazon.com: Apple iMac 21.5in 2.7GHz Core i5 (ME086LL/A) All In One Desktop, 8GB Memory, 1TB Hard Drive, Mac OS X Mountain Lion (Renewed) : Electronics
Up To 71% Off on Apple iMac 21.5" 2013 i5 2.7 ... | Groupon Goods
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
iMac (21.5-inch, Late 2013) - Technical Specifications
Refurbished Late 2013 27-Inch iMac Models Now Available in Apple's Online Store - MacRumors
New Apple iMac (2013) 21.5" Unboxing & Demo - YouTube
iMac (21.5-inch, Late 2013) - Technical Specifications
WiFi, IO & The Chassis - 21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
Identify your iMac model – Apple Support (UK)
Late 2013 iMac review: Faster than before, but the gains over previous models are modest | Macworld
Apple iMac A1418 21.5" Desktop - ME086LL/A (September, 2013) for sale online | eBay
USED 2013 Apple iMac 27" Core i5 3.4GHz 8GB RAM 1TB HDD ME089LL/A - Walmart.com