Your answer expresses that price is not an object with you? I check all the firms you mention and I only buy small insignificant accessory items from B&H. As an example---I recently wanted a Sigma fast EX lens with a range just above my existing Sigma fast Ex lens. Sigma uses an SA mount. Late at night I saw what I wanted, but unfortunately forgot Sigma makes lens with mounts for all major brands. I place my bid on the auction and about a minute late I realized I didn't check the mount as the seller didn't state the mount. I tried to cancel my bid. But no go. I could not fit a reason for my oversight. I asked the lister about the mount and he said he had no idea and to look at his pictures. I compared with other offerings of the same lens--for Nikon, Canon, Sony, and Sigma and could see it was for Sony A. Prices on the lens ranged from this offering to the mid-range of $4-6 hundred--all the way up to a grand. B&H had one for eight hundred. I went through with the auction and was the only bidder so got the lens for Sony A mount at $175. with shipping. I am buying a Sony body to use with my Sigma F:2.8 zoom Ex lens. And that is the order delayed from Canada.----

Fortunately most transactions go through as hoped and don't need "customer service support." But in the few instances when their is a problem---don't expect much or any help from eBay. If you use Paypal--you can get your money back.

Recently I purchased a camera body from a Canadian seller who promptly shipped from Toronto. Canadian post took it to customs located in Chicago in just one day. I am located 200 miles N of Chicago. Now the tracking stopped at customs. Next Monday it will have been at customs for two weeks without word or further tracking. The seller sold and shipped in good faith and is not to blame for the delay. Orders from China, Japan and elsewhere don't languish that long. One jumps through many hoops to even get a question answered by eBay and I finally got one saying they would not consider it until the estimated time in customs ends Monday after two weeks. The seller suggested they told him customs would probably be returning the camera to him and that I should lodge a return with eBay and if returned to Toronto--re-order. That certainly makes one question placing orders out of the country. But then I was cheated out of $87. earlier this year by a woman in country, with no help from eBay, but wasted much time. I know that photographers who mostly use used equipment are forced to transact on eBay. Ebay has the online monopoly. And caveat emptor. But don't expect to fulfill your hopes until you have it in your hands and have tried it out.---------