That's a steal, isn't it?
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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.
I was already about to buy Pathfinder: WotR on Epic's sale for roughly the cost of this whole bundle, so this is perfect. And on Steam to boot.
Heck of a deal for some great games. Been ages since I played through planescape.