There's no denying your seller was a bit of an idiot, if he elected to get your item sent to you directly from Amazon. Maybe he's penny pinching and trying to save on the postage, but for sure, he would have been better to have it delivered directly to him, then reboxed it and sent it out.
That way, you would not know where he bought it or what he paid for it.
But the thing is, when you are buying on ebay, you are not buying from ebay. You're buying from a seller who is using ebay as a site to sell their stuff.
I must admit, I'd be pretty annoyed too if I so easily discovered someone had sold me something and then they just ordered from Amazon and I had paid twice the price. No one likes to be made to feel a fool.
Most sellers on ebay don't do this, they obviously get their stock from somewhere but not usually Amazon. A few years back, I read about a seller who did the same thing with K mart though. I think it was kmart, maybe Target. I forget. But some buyers got upset at paying a lot over the odds for a hall table or whatever it was.
It's not breaking ebay policy as far as I know, because every seller has to get their stock from somewhere.
If I were you, I'd complain to the seller and I'd give neg feedback. Be very factual, just say your items arrived in a bag stating the order was from Amazon and you noticed the seller had charged you double what he paid on Amazon.
Then in future google the stuff you want to buy first because honestly, ebay isn't always the cheapest place. You really have to check.
