Damn! I ordered some neodymium magnets from China for a new version of my POV wheel lights (used to activate the hall effect sensor). The packet arrived sealed in a plastic bag, looking like it had been savaged by a Rottweiler dog.
There were no magnets in there, but there was a letter of apology from the German postal service.
Oops, maybe super strong magnets and metal sorting machines don't mix.