41176 the secret marketplace. This is the one with the green dragon. It disappeared first from what I remember. It was clearanced around me for $30 before Christmas. Only picked up one thinking it was too early for it to retire. Oops. 41178 dragon sanctuary, the purple dragon one. I don't think I ever saw this one clearanced, it just disappeared during Christmastime and never came back. I did end up getting a bunch at a closing Kmart for about $30 each. I got excited when the price shot to $80+ and sold one then. Then another at $100, and a couple at $125. Now I have one left that I have listed at $150, which has got to be about as high as it will go right? I also let my wife open and build one because she likes the elves line....this was before the price went up. A couple reasons I think this one does better than the secret market place, besides maybe that it's more rare, is the color of the dragon and the build itself. There's already another elves set with a green dragon. This is the only purple one. And for anyone collecting all the dragon sets , this ones main build is a tower thing that has a spot for each of the different dragon eggs.