>Desperado
It wouldn't be my first safety purchase for a remote job site.
But Amazon are selling them for home use for $1300. The ads are a little dishonest, a big scary chart showing how cardiac arrest kills twice as many people as all other accidents - true but an AED doesn't help for most sudden cardiac arrests.

There is a possibility they are useful on work sites for electric shock victims, at least for low voltage shocks that cause cardiac arrhythmia. If you happen to get a shock from an 11KV line - well, been nice knowing you!

The reason for putting them in malls is that with 100,000s of people passing through then the chance of a 1 in a million cardiac arrhythmia case becomes more reasonable.