Considering the availability of the demanded product at the respective price points, I think that my analogy is much more accurate than yours.
>Asking about the existence of such things is not a suggestion that they must be provided at that price.
Sure, it is up to you to choose what product you want. But you should still have some awareness about the price of that product in the market. If someone offers a car for 5$ on ebay, I am going to assume it is a toy, not the real thing.
The whole point of the OP's questions is that they didn't want to assume anything! I don't see the harm in asking these types of questions, even if the most likely answer to each of them is "no".
There is no harm in asking whether the 1000$ car at the used car dealership comes with cars that open like wings either, but it would sound strange.
Asking about the existence of such things is not a suggestion that they must be provided at that price. It's simply the baseline criteria for some people to want to use it.