Big pack of AD&D titles from Humble Bundle (Baldur's Gate, Icewind Dale, Planescape: Torment, Neverwinter Nights), $12 for 8 titles

It's a good deal. I've seen various packages of the old Infinity Engine games offered for $9.99 on GoG, and that sort of thing, so depending on what games you already have, you may get lucky if you wait for a similar deal at another time.

But if you need several of these games, and you think you'll play them, it's a solid offer. Pathfinder: Wrath of the Righteous (technically a "D20 open system" game, not D&D) and Dragonspear are new-ish and arguably worth a few bucks on their own.