I lucked out when I bought my WD4.

Both the plane and the extra battery were on back order. Their shipping is only $7.99, but H-L has a deal that if what you order will fit in a 4x4x4 box they will only charge you $3.00 shipping. When their shipment came in the battery was first and did fit in that small box, so they charged me the $3 shipping.

Later, when the plane came in, they didn't charge me any shipping at all, so I only ended up paying the price of the plane. This ended up where I only paid $3 total shipping for both battery and plane.

Heck, if I had bought locally the state tax alone would have been more than that.