You are basically getting new car $500-1k over invoice pricing. I think that's high for a demo. Unless its exactly how you want it or you can't wait for an order, I would leave it alone. You should be able to get it at least at invoice and then be able to subtract incentives. It's your choice ultimately, but it's not a great deal.
I will say they can probably find someone to buy it for around $70k; it just won't be an informed buyer. Plus allocations are drying out so that dealer demo goes from looking like a beat on used car to a "new car" when you can't order one anymore. That and the upcoming warm weather are what they are counting on.