Has anyone tried group buying websites? My Mom was given hotel buffet vouchers from deal grocer as a gift. I was surprised with the convenience. I just called for reservation and presented the print out in the restaurant.

However, I came across a group buying website where they are selling a handbag for an outrageously low price - 50% off the price abroad even after tax refund and 83% off (daw) locally. How the heck is that possible? Could they be selling fake items? Aren't items from these websites supposed to be regulated?