Cheapest I've seen it in a while. Don't forget Quidco.
Sims 3 for PC features:
New Seamless, Open Neighborhood - Explore the neighborhood freely. Your Sims can roam throughout their neighborhood, visit neighbors' homes, and explore the surroundings. They can stroll downtown to hang out with friends, meet someone new at the park, or run into colleagues on the street. If your Sims are in the right place at the right time, who knows what might happen?!
New Create A Sim - Create any Sim you can imagine. New easy-to-use design tools allow for unlimited customization to make truly individual Sims. Determine your Sims' shape and size, from thin to full-figured to muscular - and everything in between! Choose your Sims' facial features, their exact skin tone, hair, eye shape and color and select their clothing and accessories.
New Realistic Personalities - Every Sim in Sims 3 for PC is a unique person, with a distinct personality. Create realistic Sims with distinctive personalities. Select from dozens of personality traits and combine them in fun ways. The combination of traits you choose - brave, artistic, loner, perfectionist, klepto, romantic, clumsy, paranoid, and much, much more - help shape the behavior of your Sims and how they interact with other Sims. In The Sims 3 for PC Your Sims can now rise above their basic set of every day needs. They are complex individuals with unique personalities.
New Unlimited Customization - Every Sims 3 player can customize everything! Build your dream house or design the ultimate home. Customize everything from floors to flowers, shirts to sofas, wallpaper to window shades. It's fun and easy to change colors and patterns giving you endless personalization options. Or you can populate your Sims' neighborhood with pre-designed buildings and furnishings. Which of your Sims will live in high-end mansions, cool bachelor pads, ultimate dream homes or low-cost cottage?