Nah, I'd prefer to keep things the way it is... reason being, some fully built rigs have certain 'nice' parts that I want. Then of course us being itchy forumers will persuade the seller to sell part by part

Just keep things the way it is.... I don't find any problem finding or building a rig whether its a complete set or a piece by piece rig. Because... when i really need a rig/parts, I browse thru all the way from the first page of "CPU, Motherboards, Casings, PSU" till the last.