Dead Space 1 and 2 dual pack is currently $7.49 on amazon.  Both games activate on Origin.

http://www.amazon.com/dp/B0091UOX1W

2 Game Downloads in This Bundle          Download Size      If Bought Individually

1. Dead Space 2 [Download]                  10 GB                $14.96
2. Dead Space [Download]                 7420 MB                 $14.78

Total Individual Price                                                               $29.74

Bundle Price:                                                                          $39.98

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Knowledge is power.
Power corrupts.
Study Hard.
Be evil.

You snooze you lose.