I've been looking into the same thing recently as a way to easily transfer files to an A1200. I recently added a new HDD to a stock A1200 and I'd forgotten how limited transfer options were without the proper spare hardware to hand.
Assuming what I've found on Google is correct, the sellers on Amazon are showing pictures of their actual products, and that the products aren't cheap version that don't adhere to the standards,
- Cardbus cards all have a gold grounding strip at the end that plugs into the device
- Type I, II and III is shown by the thickness of the card - the Amiga takes Type I or Type II (I have only used Type II, Type I info from here:
https://forum.amiga.org/index.php?topic=11272.0 )
One source of info:
https://en.wikipedia.org/wiki/PC_Card and it's in line with other sources.