Just ran across this surfing the web:
"THE TESLA SHIELD™
Powerful And Advanced Transformational Technology For Mind Body And Soul."
It's a "crystal energy" / "magnetic healing" (read: placebo) "medicinal" pendant / keychain. They claim all sorts of benefits ranging from more energy to "DNA repair" and "slows down aging", etc... They provide absolutely zero solid info or research to back this up, as you'd expect.
It sells for $299.
Then I found this:
Bison Designs Capsule Keychain from REI.com (click the Purple one). $2.95
Talk about a profit margin...
Just had to share.