Today only, 9/18, you can save 40% off Halloween candy and costumes from Target. They typically run this big sale really early in the season and it is always the best prices you will find. Even after Halloween I see a lot of items at 30% and it tends to get pretty picked over before hitting 50% or 70% off.
There are some great deals- these Harry Potter costumes are on sale for $12 from $20. I can see wands and scarves and quiddich brooms on sale too under accessories.
You can order for in store pickup or you can shop online for delivery or use the Cartwheel coupon to get the sale in store.
Note online the prices are listed- there is no additional coupon code needed. Typically with these sales it is only basic costumes included not the premium costumes.
For Halloween candy, the sale is on the larger bags only of candy (priced at $9.99 and $15.99). This big bag of organic candy is $5.99 after discount.
The candy appears to be in store only, not online. You will want to grab the Cartwheel coupon to get the 40% off.