Is the trading thread in the Game Guide still being updated?
I have a list it:

*Dawntree Dragon can be traded for a large Pearl, large Emerald and a mystery box.
*Magic Dragon can be traded for one small Amethyst.
*Peacock Dragon can be traded for a large Amethyst, large Topaz and a mystery box.
*Virtue Dragon can be traded for one small Quartz.
*Naga Dragon can be traded for a large Quartz, large Emerald and a mystery box.
*Black Swan Dragon can be traded for one large Quartz, large Onyx and a mystery box.
*Night Dragon can be traded for one small Onyx.
*Night Elf Dragon can be traded for one large Onyx, large Amethyst and a mystery box.
*Mythic Dragon can be traded for one small Topaz.
*Atlas Dragon can be traded for a small Sapphire, small Emerald and small Topaz.
*Cosmic Dragon can be traded for one small Amethyst.
*Saturn Dragon can be traded for a small Amethyst, small Ruby and small Topaz.
*Eclipse Dragon can be traded for a small Amethyst, small Onyx and small Pearl.
*Fairytale Dragon can be traded for one small Topaz.
*Big Bad Dragon can be traded for a large Topaz, large Onyx and a mystery box.
*Cheshire Dragon can be traded for a small Topaz, small Quartz and mystery box.