Direct from the EA store. Free shipping on the packaged versions, also available as download. Total price for packaged versions of Spore + expansion = $42.44. Download version saves you a couple more bucks. Seems like a good deal if you are looking to get both.
Packaged:
http://eastore.ea.com/DRHM/servlet/...US&ThemeID=718200&Env=BASE&productID=95000000
Download:
http://eastore.ea.com/DRHM/servlet/...S&ThemeID=718200&Env=BASE&productID=110592000
Packaged:
http://eastore.ea.com/DRHM/servlet/...US&ThemeID=718200&Env=BASE&productID=95000000
Download:
http://eastore.ea.com/DRHM/servlet/...S&ThemeID=718200&Env=BASE&productID=110592000