I think this is way better than people are giving it credit for in online reviews, since they say "Why spend mana or lose life to cast your foe's stuff in other decks you aren't built around?" This has little value to them, and I couldn't disagree more, let's look at why
It does nothing for me personally, but I know Commander players will likely love it
Now, you can choose between a ton of different options, and some people are going to prefer Unhinged, Unglued , or even Zendikar basics over Unstable , which will likely keep the price from going too high
0: You draw a card and you lose 1 life
This was also Black Markets first proper reprint, though we see it much more frequently now
Generally speaking, this should still be a fairly good standard for which cards are the most collectible in the set, even with some ups and downs