This wireless rear view parking camera has been rated > 4/5 by 745 reviews and can be assumed to have good quality (those who already own can comment on it). Kogan website shows $109.
Description from website :
Reverse park like an expert with a little help from a wide angle camera and 7” colour screen.
Choose wired or wireless installation
Fit the 7” screen over your existing mirror
See a 120-degree view behind your car
Reverse park into tight spots with expertise when you install the Kogan Wireless Rear View Reversing Camera. The camera transmits a 120-degree wide view wirelessly to the colour screen. It gives you the confidence to manoeuvre your car safely in reverse gear. Fit the 7” colour screen on your existing rear view mirror and watch it function superbly to transmit real-time videos when in use. When not in use, it doubles up as a mirror!
Probably mostly fake reviews. One that might not be fake but…
lol.
Used to (reluctantly) fit these as a sub-contractor, mirror screen is cheap and nasty, menus in newspaper font with horrible sounding beeper, camera is considered illegal as it obscures the top part of the number plate when fitted. Wireless can be problematic also.