So I just heard through the Beauty Blogger grapevine that Sephora and OPI will no longer be collaborating on polishes! Why? I'm not sure at this point, and it hasn't been announced yet but sources say that someone has spoken to Sephora and they did indeed say it had been discontinued. That very much would explain why these polishes are discounted at the moment and why the Sephora Disney Ariel Collection polishes are the Sephora X set instead of the Sephora by OPI like the Cinderella and Jasmine collections were.
SEPHORA BY OPI CINDERELLA NAIL POLISH SET
A BRUSH WITH FATE
SEPHORA BY OPI JASMINE NAIL POLISH COLLECTION
ONE IS NEVER ENOUGH
SEPHORA X ARIEL NAIL POLISH COLLECTION
I don't believe there has been a public announcement yet, but I'll update once I hear anything more. For now, if you LOVE Sephora by OPI, I would suggest you go grab what you want!