Moving Soon - Should I Pack Up Everything Now??

I would say "it depends".

(I am also in the middle of moving house, so hear me out....)

If you're planning on STAYING in the current house while the system is there, and you don't live in a high-crime area, It's probably safe to leave the system set up.

If you're planning on vacating the house while it's on the market, I'd definitely pack it up before taking any pictures. 

Fortunately, in my situation, I own both houses, so it's just a matter of moving the stuff from one to the other. In other words, I got the expensive stuff out before it hit the market. I also live in rural NH, and, well....you wouldn't want to get caught breaking and entering someone's residence up here, if you catch my drift. 😉

If there's any doubt, err on the side of caution. Not worth the hassle, risk, paperwork and subsequent court appearances.

Or give up > 20% on a buy "as is" deal.

I suppose it would depend on what the housing market is like in your particular part of the country, as well as how much lag time there would be between the sale and your actually moving out.

If it's slow and there is a high probability of an extended delay, I would suggest just moving your components out of camera range, take your pictures and then move everything back.