>That is either an unreasonable or a flawed analogy, depending on exactly what you meant.
What I meant was not necessarily related to the items I suggested, you can change them for whatever you like. I was addressing your argument about "selling below market price" and illustrating that the market can be manipulated and the natural "market price" be specifically manipulated by arbitrage of the entire available stock of something.
It seems you want to turn the discussion back to specific types of items instead of your original argument. Regarding that I will say that I do not think that manipulating the price of any item (luxury or critical) by acquiring the entire available stock and raising the price is good for the market or for society.
I will say that I do not think that arbitrage of a single item if there is an otherwise existing market and supply of the item is a problem (ie. you can sell your single ticket for whatever you can get), but to clean out the supply and artificially raise it is.