Cbpbook and cssmentor are working quite good. I have just checked.
It seems like you are answering your own query by posting link of some Facebook page
and if it's true then bro I feel sorry for you ,really bro
If you want to buy from ilmi then they have got their own website too;
https://ilmikitabkhana.com/
By the way , if the link that you have shared is giving on reasonable price then try this link yourself too
and let others know about it then.