All come with the same standard 1 year warranty as new models, are fully tested, cleaned, and given a refurbished serial number. These are eligible for the FREE Mac OS X El Capitan upgrade (available in Fall).
2014 iMac 21.5" 1920x1080 Core i5 Dual 1.4GHz GHz, 8GB/1TB $929
2013 iMac 21.5" 1920x1080 Core i5 Quad 2.7GHz, 8GB/1TB $1099
1920x1080 Core i5 Quad 2.9GHz 8GB/1TB $1269
2560x1440 Core i5 Quad 3.2GHz, 8GB/1TB $1529
2560x1440 Core i5 Quad 3.5GHz, 8GB/1TB $1609
5120x2880 5K Retina Core i5 Quad 3.5GHz, 8GB/1TB $1699
5120x2880 5K Retina Core i5 Quad 3.5GHz, 8GB/1TB Fusion $1949
The iMac 27" Retina 5K displays boasts 14.7 million pixels which is almost 4x as many pixels compared to the 2560x1440 27" models to pick up fine details in pictures and videos.