Gibbspaulus, I think you should keep him on his card just this once. As figures go, we all know that he is one of the rarest so it would be nice to keep him complete. However, what's to say that you'll never find another at a reasonable price? Maybe buying another bundle from the Entertainer would be the answer. Flog the other items on ebay and make some money back then you could have the best of both worlds.
Go on, treat yourself, i'm sure you can find some way of justifying it!
btw, I have also ordered the bundle but I'm not an opener of the figures so fortunately, I don't face the quandry you do