price of a camera or camcorder must cheaper than anyone elses
 

If they are cheaper by a significant amount chances are its a scam Here is a website that shows a bunch of these companies look before spending your hard earned money:
http://www.panix.com/~donwiss/pictures/BrooklynStores/

lol, when I say Brooklyn in the link scam came right to mind. A lot of places sell what are called grey products - they were manufactured for sale outside of the US - and do not have a warranty in the US. You may also find that when you go to order they process your order then call you and tell you it is out of stock would you like such and such and oh by the way this one we are now selling you is an extra couple of hundred bucks.

Are they scams or just grey market?