Get 25% off Halloween Costumes and free shipping when you use the promo code SAVE25CS during checkout at Newegg. This promotion includes the pictured adult-size Harley Quinn Costume, which listed for $49.99 and drops to $37.49 with the code. As an added bonus, you can also get a $5 Newegg gift card when you order select costumes (including the above Harley Quinn costume). There are kids costumes available too. This Kids' Police Officer Costume Set usually sells for $31.99, but you can get it for $23.99 when you use the code. These are the best prices we can find anywhere online. Sizes and styles may sell out quickly. There's no sales tax (except CA, IN, NJ, and TN).