I have heard that a lot fo recipes will not drop in instances unless there is at least one person that can use them. If this is true should I have my team cover the different crafting professions : enchanting, jewlcrafting, blacksmithing, engineering, etc?

1. Do I have to have the skill level to use it, or just have it trained?

2. Are these BOE? or as some of them BOP?

Personally I would love my jewler, who is not on my multibox team to reap the benefit of jewlery recipes if possible. All the needed ones go for over 300 gold at the AH and I hate paying those prices.