This iMac is in good shape and runs great! 

May show sings of wear (please refer to pictures).

Details: This model is powered by a 14 nm, 64-bit "Seventh Generation" Intel Mobile Core i5 "Kaby Lake" (I5-7360U) processor which includes two independent processor "cores" on a single silicon chip. Each core has a dedicated 256k level 2 cache, shares 4 MB of level 3 cache, and has an integrated memory controller (dual channel).

This system also supports "Turbo Boost 2.0" -- which "automatically increases the speed of the active cores" to improve performance when needed (up to 3.6 GHz for this model).

This model has an Intel Iris Plus Graphics 640 graphics processor that shares memory with the system.

This model has a 21.5" LED-backlit 16:9 widescreen TFT active matrix display with IPS technology and a native resolution of 1920x1080. The cover glass is fully laminated to the LCD and it has anti-reflective coating to reduce glare.

This model can simultaneously support the internal display at full native resolution and up to one 5120x2880 (5K) external display at 60 Hz with support for one billion colors; two 3840x2160 (4K UHD) external displays at 60 Hz with support for one billion colors; or two 4096x2304 (4K) external displays at 60 Hz with support for millions of colors. It supports both extended desktop (second workspace) and video mirroring (internal display duplicated on the external display) modes.