"if you look up in the trade skills section it lists all recipes and where from , as you say the auction house is crazy for prices and a lot farm ? vendors and sell at rip off prices , as an example there is one auction seller that buys recipes for less than 50s and always posts at around 40g , and the higher level recipes he buys at a few gold and sells for 100,s of gold"
I do that sort of thing all the time. It is not a rip off. It is a convenience. The seller is selling his real world gaming time that he took to gather the items in exchange for gold at the auction house. Don't kid yourself, doing this repeatedly is tedious, even if it does have a high pay off.
No one is forcing you to buy those items from them at the auction house. You could do the same trip your seller did and buy them cheaply for yourself. If you find that daunting, you've just answered for yourself why the auction house price is fair.
My current mindset is that if I can't sell it at at least a 200% markup (3x the price) it isn't worth ******** around with. And if the payoff isn't at least tens of silver, it isn't worth ******** around with. The stuff I sell regularly has a markup in the thousands of percent and the payoff is in the gold, and you know what? It must be worth it, because the demand is always there, I have a good turn over, in fact I have to restock often, and I'm rarely the most expensive seller.
And you know what else? If you think the prices are too high, you are free to farm them for yourself and sell them at the same auction house for less. Have at it.