Hello. I'm looking to build my grandfather a pc for his birthday. He has a pretty old one that stopped working. He'll only be using it to browse the internet to read news or watch youtube on a 720p monitor so it doesn't need to be strong. I already have a case, and a hard drive and a power supply, and I need help with what components I should put inside. I'm only looking to spend 100$ tops. I will be buying used. Thank you in advance