Just keep in your mind, that they dont sell these books to make you happy,
They only sell them to gear their members, they dont care about your opinion on prices, they would rather keep it and never sell if members didnt need ANY thing
That's actually not true at all. We sell these items because we have a surplus and want to give players outside the clan an option to buy them. And as for the pricing, I personally feel the prices are quite fair. Level 100 luxury offhands for druid and mage from Cabry's shop are $350-$375k. These dark grimoires not only are main-hand weapons, but they are harder to obtain (You can't just conveniently buy them from a shop; you need to hope that they randomly drop from Aggy - and they don't drop as often as you may think) therefore I would say they are equally, if not more, valuable.
At any rate, you can argue with me if you'd like, but nobody is forcing anybody to buy a grimoire from Avalon. We offer them as an option for those who wish to.
Aer