Aaron Christophel | 1,20€ Rear view camera, small hack and review, incl. shipping from Germany @atc1441 | Uploaded August 2021 | Updated October 2024, 9 hours ago.
This video is more for German people as the parcel will be shipped from Germany.

if in any time in the future no more Cameras are available call this video obsolete

Here are a few links, it seems there is always only one available but they do restock them after a sell:

*no affiliate links

ebay.de/itm/184915220106
ebay.de/itm/174822339183
ebay.de/itm/184923566342
ebay.de/itm/284390298331
ebay.de/itm/353588764974
ebay.de/itm/373620212865
ebay.de/itm/304056211707
ebay.de/itm/174827592366