My guess is he is talking about this: **broken link removed** $1500!!! Check out the quote from the customer on that page. Hilarious.
IMHO, this is a complete ripoff for 99.9% of the customers that get sold it. If your power is THAT bad, you've got worse problems than getting your home theater working well. But unscruplous dealers sell it with the line "you've just spent $15000 on a home theater, are you going take a risk that a power surge won't happen??? It's cheap insurance".
By the way, I love the gratuitious use of "automatic" in the name. Guess it's to distinguish it from a manual voltage stabilizer.