I’ve just upgraded to a newer iMac and am selling my older one from 2011 which is still in excellent condition.
The graphics card and hard drive were replaced in 2016, so those are brand spanking new.
Here are the specs:
PROCESSOR: 3.4 GHz Intel Core i7
MEMORY: 8 BG 1333MHz DDR3 (4 slots for memory, 2 of which are empty so you can add more memory)
GRAPHICS AMD Radeon HD 6970M 2048 MB
STORAGE: 1 TB
$700 OBO, I can be extremely flexible on pricing!