Questions: Is it worth it to myself and the guild to join up now or should I gain some character (lvl 15 now) and crafting levels so I am actually gathering materials that will be worth something to sell? Does most of the content in this game scale to the level of the looter? I..e. will I get better materials and loot drops when I am higher level?
I'd like to contribute to any guild I join, not just use them for a place to sell my gathered materials.
Bottom line: If you're focused on playing the game and not tons of trading, a Trading guild in a less costly location is going to be better for you, at least for now. You can always change if your needs change.
If your goal is to get rich as fast as possible, good money can be made at any level and a guild such as ours would work for you!