Origin keys:

Dead Space - 3 ref

Burnout Paradise: The Ultimate Box - 3 ref

Medal of Honor - 1 TF2/DOTA2 keys

Command & Conquer: Red Alert 3 - Uprising - 2 ref

Populous - 2 ref

Steam keys:

Max Payne 3 rockstar pass - for 1,5 keys TF2 keys

Command & Conquer: Red Alert 3 - Uprising - 2 ref

Currencies

1 key = 8.55 ref

1 TOD = 3.44 ref