This 30' Playbulb Holiday Light String Extension drops from $49.99 to $25, while the 15' version drops from $19.99 to $10 at Macys.com. Shipping will add $10.95, but your total will still be $7 less than the lowest price we found for the 15' version and $15 less than the lowest price we found for the 30' version. These are extension packs and the main 33' unit, which can be purchased at Amazon, is required in order to use them. They can also be changed to over 16 million colors and set to four different lighting effects using an iOS and Android controller app. Sales tax is charged in most states.