These, on the other hand: (1) have an artificially constrained supply. WotC could print millions if they want. If people demand it enough, they might. (2) are kind of ugly. They are meant to be a piece of paper taped onto a card. The aesthetic is not particularly beautiful. (3) Not legal for tournament play and are not supposed to be played with as real cards. I know I wouldn’t be happy if someone tried to play with these in a game of Commander. (4) Because of reasons 2 and 3, the demand is highly uncertain. Some of the demand is because these are the new hot thing on the block. Look at the price of foil and nonfoil rares from Unstable. They have cratered since the initial spoiler season. Once things are not the new hotness, especially if it’s not legal for play, people forget about them, learn to live quite well without them, and demand falls.

In short, these are likely not a good investment. The only thing propping these up right now is recency and scarcity. It’s not playability. Scarcity is artificial and can easily be reversed if WotC prints more. They aren’t pretty like Kaladesh masterpieces. They are not playable like other cards. I can print these on my printer and get the same effect, and they wouldn’t even look worse.

I think it’s a fool’s errand to go chasing these, and bravo to anyone who was able to unload them. Check back in a year. There will be some of these available for $1 or less.