Sears.ca currently has LEGO Star Wars Imperial Assault Carrier on sale for $119.99 (reg.$149.99). Savings work out to be 20% off. In addition, when you use coupon code 941612557, you can get an additional $20 off. The coupon also works for many other items as long as your order is above $100.
Final price with the coupon works out to be $99.99 (reg.$149.99) which works out to be 33% off. Free shipping on orders above $49. Thanks to forum member PoisonIvy for the tip.