Indeed, your Eternia being that complete is worth a lot. Probably go between 700 - 1k dollars depending on the condition, ie, if the track is crack etc. Figures are a different story. Each one is going to have a different value, and people on Ebay or here are picky. I just scored a complete king hiss for 1.29 plus shipping, while there are other auctions for the same figure that are also complete and the seller wants 29.95. Just do a little research, look at auctions that have ended and ones that have sold. That will usually get you a pretty good indication as to what MOTU buyers are willing to spend. It all comes down to that. A book or someone can tell you your collection is worth a million dollars, and it just might be, the trick is finding someone to pay that. Whatever a person PAYS is how much the item is worth.