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GamersGate / GamersGate UK has a few midweek deals up.
F1 Midweek Deal
F1 2013 $12.49 (Steam)
F1 2010 $7.49 (Steam)
F1 2011 $7.50 (Steam)
F1 2012 $6.25 (Steam)
F1 2013 Classic Edition $22.10 (Steam)
F1 Race Stars $20 (Steam)
Retrobooster Midweek Deal
Retrobooster $9
Dominion Midweek Deal
Dominions 3: The Awakening $5
Dominions 4: Thrones of Ascension $8.75