Radcitys were on Blowout this December for 999, my guess is Rad Power will be the one to do it first.
And Rad Power did just recently announce their just under 1k bike that is coming out in the fall.
A good quality non-electric road or city bike is going to cost $400 to $600 dollars. The cost of a motor and battery added to that will bring the cost above $1000.
I agree with others who suggest checking out the used market. I've seen a few nice e-bikes for sale locally for under 1k, that were likely around 2k when new.