It is not solely dependent on luck, but rather the cost of the product. A sales business can only go so low in terms of price, due to the cost price that they get the products from suppliers at. Tell me, which salesperson will make a huge loss just to match the price? They have to survive, have to earn a living, have to pay for rent, and have to bring in new stocks also.
Chances are, if anyone is willing to match the price, their source of the product is questionable, ditto the validity of the warranty. It is most likely that they have imported a grey set (i.e. not a set received through Tithes Marketing, the distributor for Tamron in S'pore).
