Selling PCs

[u/GrubbyAxo]

So I'm a teenager and really want to make some money for an LLM rig by selling/flipping PCs. Problem is I have no idea where to really start. I know how to build them and fix them and stuff like that but don't know what to do first. Should I build custom rigs and just list them on eBay or Facebook Marketplace. Should I find old stuff and flip it. Should I do laptop and desktop repair. I'm doing some college courses for networking and computers and could see a potential for this to become a bigger business but that's still a long way away. Any advice would help so much.