Hi: At ADAFRUIT the Raspi0 starter kit ($50.00 plus) is out of stock. So it will not be easy to get it for $ 5.00 for a while.
Microcenter in Tustin had it for $ 5.00 and two for $9.99. On the other hand I saw a Zero advertised as "one per household"
So - the demand must be huge.
I have a question on that other post here - Why is audio not needed?
HDMI output delivers video and audio. This means that you will get only video and no audio from HDMI.