Oh man I cannot imagine getting all the weapons in this game. I don't recall the specifics but I do remember looking up all the weapons when I first got the game and it seemed some were pretty hard to get--like ridiculously so. Are you finding this to be the case?
For me the best weapon I got was the pistol fromIt was cool and sort of scratched that itch to get an awesome weapon, but looking back I'm just not a fan of the way the legendary weapons were handled.chest in the treasure room.
I don't like how some weapons are only available to via trading, and many of the ones you find in the chests vary between players games. So your awesome pistol might not be available to me.
The weapon chase isn't as bad as finding all the dolls from Fable 2. I didn't even bother to do that.