I buy almost everything from OS simply due to the huge savings. I just bought 400/2.8VR which is about $11K+ here in Australia, but, I got it for AU$8490 landed on my doorstep from the USA. Why would I buy it here, and how could the cost of the item be so different in 2 different markets? Thieving distributors and or retailers......

All the big USA stores, and many of the HK resellers are honest, reliable and all will save you lots of $$, the more you are spending, the more you will save.