Apple iMac 21.5" - Late 2013 Reviews, Pros and Cons | TechSpot
Used Apple A Grade Desktop Computer iMac 27-inch (Aluminum) 3.5GHZ Quad Core i7 (Late 2013) MF125LL/A 8 GB DDR3 1 TB HDD 2560 x 1440 Display Sierra 10.12 Includes Keyboard and Mouse - Walmart.com
Configure your own 21.5-inch Apple iMac (2013) at OWC