Swift Vastira isn’t really worth much, plus this question is always hard to answer. It’s easier to tell you if there is an offer whether its worth it or not
Someone made an offer for my SS that was the following:
i will give you 2 clean mino sets, 1 hard exiled chest, 1 hard mino chest, a hard vastira, 2 clean exiled chests, and a strong vastira and a clean woj for your hard ss