ThinkGeek takes up to 75% off 300 items in its clearance section, as part of its Summer Sale. (Prices are as marked on product page.) With deals from 99 cents, it's tied with our mention from three weeks ago as the best sale we've seen from ThinkGeek since February, when we saw up to 90% off with stacking coupons. Shipping starts at around $5, or get free shipping on orders of $75 or more.

A best bet is the Donkey Kong Wall Decal Pack for $27.99 plus around $7 for shipping. (Select the correct style from the drop-down list to see this price.) That's the lowest total price we could find by $37. It includes three 26" x 40" sheets of wall decals.