I posted earlier on the Children's Place great deals. Those deals are still going and Shipping is FREE-no minimum or code needed. Also, you can still use coupon code: D2F2011 to get an additional 20% off.
Check out their Halloween costumes, where most are 50% off. This monster costume is just $9.58 shipped with coupon code.
This Chick Costume is just $7.98 shipped with coupon code.
For even more savings, use ShopAtHome to get 6% cash back.
ShopAtHome is a great way to save money and even MAKE money by using ShopAtHome for online purchases that your are going to make anyway. You will get a $5 bonus credit just for signing up - but you must buy something through ShopAtHome within 30 days to keep the bonus. Once you hit $20, you will get a check mailed to you.