The cost of this lens in one on-line store is around 2,095 SGD brand new while the common local stores cost is around 2699 SGD also brand new.Then in the second hand (used) market costs around 1800 to 2300 SGD.My question is what is the difference between these on-line store and the common local store.I do not want to speculate so I am asking those who had the real encounter.For sure I can save with the on-line store but I am not sure of the catch.Thanks everyone.