My system was in a non-dedicated room (living room) and absolutely required packing it up for several reasons: no one (practically) cares about my audio hobby, even those who say they enjoy music; for couples looking to buy, perhaps a rare guy might appreciate it, but most certainly his female wife will not; people WILL touch your gear - they cannot help it; accidents happen so it will be at risk.
However, I was without my stereo for months and I missed it dearly. So I'd say if you will be living at the house while for sale, and if it is in a dedicated room, you could leave it so you could still enjoy it. You could advertise it as a media/home theatre/man-cave/craft room. But only if you could somehow rope off the doorway and only allow supervised entrance to adults. Realize, people often will have their kids with them running free so one rope will not be efficient - electric fence perhaps? But if not in a dedicated room, then pack it up.
However, I was without my stereo for months and I missed it dearly. So I'd say if you will be living at the house while for sale, and if it is in a dedicated room, you could leave it so you could still enjoy it. You could advertise it as a media/home theatre/man-cave/craft room. But only if you could somehow rope off the doorway and only allow supervised entrance to adults. Realize, people often will have their kids with them running free so one rope will not be efficient - electric fence perhaps? But if not in a dedicated room, then pack it up.