Desktop computer (Greenstead CO4)

I am looking for a desktop computer in good shape to help me with academic research and practicing technical skills.

I need something that boots up and runs reliably. Ideally, it would include the tower, power cables, and a monitor, but I am happy to take just the tower if that is all you have available.

I can come and collect it at a time that suits you. Please let me know what model or specifications it has if you know them.

Thank you so much for your help!