Fzcstore via eBay offers this open-box World Travel Vinyl Wall Decal for $2.56 with free shipping. That's tied with our January mention as the lowest total price we've seen. (Outside of other eBay sellers, it's the best now by $2.) It measures 28x20" and is easy to apply and remove.

Note that this item ships from Hong Kong and may take three to eight weeks to arrive. It also may be missing its original packaging.