All of these in their original boxes
The Longest Journey: award-winning adventure game $8
Dreamfall: sequel to The Longest Journey $8
Star Wars Knights of the Old Republic $10
Civilization IV $8
Elder Scrolls IV Oblivion + Elder Scrolls IV Shivering Isles (expansion pack for Oblivion) $12
None of these are online games or registered anywhere so don't worry about DRM.