Save up to 76% off Adult & Kid Costumes at BuyCostumes.com, with prices starting at $3. This is the best discount we've seen from them in recent months (although we saw up to 85% off in May). Some best bets are the pictured Lady Bug Adult Costume, which drops from $49.99 to $12.46, or this Candy Corn A-Go-Go Child Costume, which drops from $29.99 to $10.62. Shipping adds $4.99 or is free on orders over $75. There is no sales tax (except NC, NY, WA, WI).