This anthology includes:
- Baldur's Gate 1+2
- Icewind Dale 1+2
- Planescape: Torment
- The Temple of Elemental Evil
Personally I haven't really used Impulse since Demigod's release, but all of the classic CRPGs (minus Neverwinter Nights) for 10 bucks seems good enough to me to open it up again.
And the link: http://www.impulsedriven.com/dndmaster
Rock Paper Shotgun says it's £6.38 and €7.56 for you European folks.
EDIT: Looks like they also have the Neverwinter Nights pack also on sale for $14.99 that includes both 1 and 2 and all their expansions. http://www.impulsedriven.com/nwncomplete