Here you can find imac "27 model 2013 with core i5 cpu + upgrades. Can use for any needs.
Model: Late 2013 (A1418)
Screen: 21.5" 2560 x 1440
CPU: i5 with 3.2GHz
RAM: 32GB DDR3 1600MHz (max 32GB)
Hard Drive: 1 tera SSD pure (not fusion)
GPU: Nvidia GT755 1GB
Ports: USB3, Thunderbolt (Ex adapter HDMI)
Extentions: Camera, Microphone, buit in Wifi
S/N: TF1E85SA-XXXX