I get most of my stuff from either Amazon or Adorama. Never had much luck finding good deals at B&H. As others have said, be careful with "unknown" online merchants. When I shop on Amazon, I try to order an item that is "sold and shipped by Amazon" but depending on the item, it maybe be sold by Amazon and fulfilled by a third party. I've bought a few lenses from 17th Street Photo via Amazon and never had an issue. Main thing to keep in mind is if the price seems too good to be true, it likely is.