The witch set?

The mummy set? ( Or mummy armor with pumpkin helm)

Or the Grim set?

I've always a poor player in mmos, but now heres a chance to make over a million. Which vanity set do you like the best, and which do you think will become the more expensive in the future? I have enough to buy just 1 and I want to choose the one with the most value in the near future