Okay so this may sound a bit crazy at first but hear me out. So as everyone knows, elytra have been added in 1.9. Everyone wants the elytra be in egg wars but i don't think that there is a price high enough to buy it. So here is my plan: Make there be a Chest/Ender Chest in the very middle of the map that requires a "Key" to open. The Key is bought for a stack of diamonds. Then you use the key to unlock the chest. Inside of the chest you can but an elytra for another stack of diamonds. Once the chest has been unlocked by the key it can be bought as much as you want, but the chest in only unlocked for you. Thats my idea, and i hope that it is a well received one.