Costume Express is offering an extra 35% off sale, closeout and clearance costumes with coupon code WEB
[Exp 10/31]. Shipping starts at $5; free shipping on $90+. The pictured Harry Potter Deluxe Robe Adult Costume
is on sale for $30 - 35% off w/ code + $7 shipping = $26 shipped
. Link includes a special video of a guy casting spells dressed up as Harry Potter if you're looking for a few seconds of entertainment.