I don't remember for sure what I have bought in the last six months, i just know it has been a lot. Of the ones I think i bought in that timeframe I have to agree that Alchemy and Herbalism, Book of the Righteous, Traps and Treachery, and Goodman Games guides to were rats and dopplegangers are at teh top of my list of favorites.
Book of the Righteous is my absolute favorite though. It is, hands down, far and away, the best treatment of religion I have ever seen. I have been gaming since about March of 1986 and I have seen most, if not all, of what has been offered for D&D in all of its incarnations. This book brings life to religion for a gaming environment.
Even if had paid the 40.00 for I would say it was more than worth it. Of course I would wince with some pain when I said it, but I would mean it.
I'll have to check this Midnight out.