I logged onto steam and noticed that they had this deal.  All Sims 3 games except for Pets (50% off), Master Suite Life Stuff (25% off) and Showtime (retail price) are on sale for 66.6% off.  The deal lasts until March 8th!  **NOTE** You MUST have the base game on Steam to be able to use the expansions
http://store.steampowered.com/app/47890/