Hall of heros and a guild hall

K, I have been to Lions Arch in the hope of getting a Guild Hall, but then I find out that I need this signit thing and I need to go to the Hall of Heros. So, how do I find the Hall of Heros? And what is this signit I need to get a Guild Hall?

You need to acquire a Celestial Sigil before you can purchase a Guild Hall.

The Hall of Heroes is the top map of the Tomb of Primeval Kings. You have to win out through the tournament and win at that top map to acquire a Sigil. One Sigil is awarded to a team member randomly.

Otherwise, you do what most people do - try and buy one from someone who has been winning them.

Peace,
-CxE

and where do the people who have alot of them usually sell them and for how much?