Assuming your don't have an aversion to open box items, I got my Z9F from BB for $550 in 'excellent' condition at my local store. Looks great, had all packaging/parts except the Atmos demo disk and everything works. Amazon has them occasionally from the warehouse that are still NIB but the description reads "Packaging will have damage". I got the rear speakers that way, still factory sealed in a damaged box, for a good deal off. Don't see any at the moment there, but if you are diligent you will see them.
Just a thought.
Sony XBR-65X900F // Sony HTZ9F Sound Bar & SAZ9R Speakers // Xbox One X & PS4 Pro