I agree there is no difference. It's just as unethical. If you put a reasonable price on for example ebay and the price skyrockets, that's fine but if you expect a very high price initially then that's borderline unethical. But how high is too high is something everyone will have a different opinion on.
Wow. Ever heard of capitalism? He can only sell it for what people are willing to pay whether that be $100 or $1000. If an iPhone 5S is worth $1000 to someone then they will pay it. There's nothing unethical about selling a product for what the market is willing to pay for it.