You won't have any problems getting your money back on this one (and then some), especially if that third head stays exclusive to PO's which it should if I read the instructions correctly. It all depends of coarse on supply and demand but at this price point it's really a no brainer taking that chance. I mean, that exclusive head is pretty freaking cool and I would be bummed not to have it.
TL;DR
What I am trying to say is it's possible this figure could pay for a large portion of your Ledger Joker should you decide to sell it.