I'm wondering where and when the Prime Gothic Corset costume (Normal version was a reward in the weekend after lasts tier spender event) was ever released, whether it be in the Tier spender event, a reward for something in game, or otherwise given through GM events.

I've been searching for one and only see common and Alpha versions. Starting to assume the only way to get it right now is through the Arcane box. =(

I believe it was in a previous tiered spender (before the one last weekend, not sure how long ago this was) and it appears on the Crystal Altar every once in a while when the PM, Spyra, decides to throw it on there.

I'm not sure how long ago the prime Gothic Corset was utilized but I'm sure it's only a matter of time until it gets placed on the Crystal Altar or a tiered spender again. The only thing I could suggest doing until it gets utilized again is to keep checking the AH or ask Peer/World chat every once in a while as there may be someone out there willing to sell one.

Best of luck to you.