All instances of weapons like the Zenistar (and I assume the Zenith and Azima, etc) are unable to be sold from the players inventory. Given the ability to freely buy blueprints on these items, from Simaris' Offerings, could only ONE of EACH of the listed items be account bound at any time? In this hypothetical, if a player were to choose to sell both, they would be displayed a message saying that only one could be sold, (something along the lines of: "You can't sell your last copy of this item."), and the other would have to be removed from the sell manifest to proceed.
If this is reasonable, moving forward, could this possibility be extended to other unique weapons where it makes sense to do so?