بسم الله الرحمن الرحيم
The parts of the computers are costly and valuable per se. There is no harm in selling and purchasing. If someone misuses the computer then he shall be responsible for the same, you are not responsible for the same. However, if you are sure about someone that he shall misuse the computer necessarily then you should avoid selling him.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.