This 2008 iMac still in great working condition. I will be formatting the drive, so you will need to install OSX again. 

To install OSX on a 2008 iMac you will need to change the date to get it to work following these instructions.
https://www.reddit.com/r/MacOS/comments/t194n8/cant_install_macos_on_wiped_2008_imac_any/


Experience the power and functionality of the Apple iMac 20 Inch 2008, featuring a 2.6 GHz Intel Core 2 Duo processor. This all-in-one desktop computer boasts a stunning 20-inch screen size, perfect for productivity and entertainment. The sleek and stylish design complements any workspace and the included Apple software provides a seamless user experience. Ideal for both personal and professional use, this Apple iMac is a reliable and efficient choice for your computing needs.