Nvm, you said "before Cata". Personally, I've stopped gathering herbs. Prices for both bare herbs and flasks have dropped through the floor on my server. Mining can still net 2-3k per day just from smelting/selling Saronite bars. Add in some Titanium/Titansteel and Eternals and I'm still making about 5k per day on 1 bot.
Left in for reference:
- Obsidian is the new common mineral (same as Cobalt in WotLK) found when mining in Cataclysm, and can contain gems, Volatile Fire, and Volatile Shadow.
- Elementium is the new uncommon mineral (same as Saronite in WotLK) found when mining in Cataclysm, and can contain gems, Volatile Fire, Volatile Water, or Volatile Earth.
- Pyrite is the new rare mineral (same as Titanium in WotLK) found when mining in Cataclysm, and can contain gems and Volatile Fire.
These are going to provide the biggest profits. They will be needed for a lot of different trade skills (mining, blacksmithing, jewelcrafting, engineering and even alchemy to some extent) so the demand and price will be high for the first few weeks.