dunno... why dont you do the math yourself?....
Here are the Steps:
1) Select Item, and quantity
2) Add to cart
3) Go to your cart
4) Enter your Postal code, and country
5) Press: shipping estimate
and do the same for all other retailers!
and Compare the prices yourself...
PS: I Don't mean to be a jackass, but c'mon dude, you've never bought something yourself before, and compared prices before buying?.... :P
"A workout isn't easy, but neither is being fat, make the right choice"