How many exotic scrolls for a sunken piece?

How many exotic scrolls do you think sunken iron or sunken warrior is worth?

I’ve gotten offers where people are willing to trade halloween seasonals for 5-7 powerful or armored scrolls. Would it be better to try and trade up for something like seasonals or legendary fish scales?

halloween seasonals are the best pick, sunken and legendary fish scales will always be obtainable and will go down in value