Over three turns, you can hopefully generate one mana, create two Constructs, and tutor a Sol Ring, Shadowspear, or Skullclamp straight onto the board
However, its price has been dropping even while this article has been being written , highlighting again the current fluidity of the market
You can't use Barret's last ability to try to attach an Equipment to a Rebel if that Equipment can't legally be attached to that Rebel
Then, if its a Land card, you can put it into play tapped, and if its not, you get to draw it
There are also unique sets like the Challenge set for competitive events, and the D23 Collection set that were only available in one special collectors box set