I've purchased Dhamma books before from...Buddhist Publication Societyhttp://www.bps.lk/
... before and found them to be very good... seemingly only charging "cost price" or thereabouts for texts and postage.
I've ordered Wisdom Publications translations of certain Nikayas (as translated by Bodhi, Nanamoli, Walshe) from Amazon because for texts like that, the discount offered by Amazon was enough to offset their ridiculous postage rates to Australia.
Where do you get yours?
"Having understood name-and-form, which is a product of prolificity,
And which is the root of all malady within and without,
He is released from bondage to the root of all maladies,
That Such-like-one is truly known as 'the one who has understood'." (Snp 3.6)
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)