Indeed, I believer there are some that actually buy things they know others want, and place them in buildings and then have the cheek to at least double the price of what they paid in the hope you will buy it and they will get rich.
I think they are called shops.
I am not saying I personally approve of someone doing this, but it's normal business and 100% legal.
I hope no one defends Apple using dubious, albeit legal means to save paying millions in tax, but then has a go at an individual trying to make a few dollars themselves.
And just to note: In reality this is not harming anyone, as there is still going to end up with someone who wants the Apple watch getting THIS apple watch. If this person is happy to pay a little more to get it, then that is their business.