I have the itch to build another pc, and this will be the first one I'd put up for sale. It's going to be an entry-level gaming/ Ryzen APU build and would like to market it as a Ryzen upgrade path for entry-level gaming. So no GPU. I'd like to go local and deal in cash. But how do I warranty or do I even warranty MY work on it other than the manufacturer's warranties, and for how long?? What's the best way for me to do this type of deal?? And what is a fair amount to mark up from parts pricing??