I know that the auctioneer is Zairik. But, the auction appears to be happening on the ScytheRO forum. And, the majority of players on a normal server tend to be just that: normal players. Only a few players might have experience with administrating a server, editing/updating eAthena, scripting, making patches, bug fixes, etc. Where as, on eAthena, a much larger percentage of the people there are experienced. And those who aren't usually have already started learning.
