If you're lucky the best CPU you put in that socket is a 5800x3d. Which is a good CPU, but it's going on 5 years old at this point. The GPU needs a massive upgrade. You MIGHT be able to find some still decent priced DDR4 RAM but that's doubtful in this market. You'd be sinking a lot of money into older parts. I'd say buy new and with the way RAM is priced these days I'd honestly get a pre built while they still have half decent prices. Something that will actually let you upgrade it when prices become not retarded. So no proprietary cases or boards.