I'm not entirely sure, I don't personally own a wall scroll yet [unless you count the mini ones that came with a few of my Skytube/Alphamax figures]. I've heard they're pretty long though, so I don't believe they can be shipped via SAL. They shouldn't be terribly heavy though, and if I combine it with my monthly shipment [which would likely be EMS anyway], I shouldn't have to pay that much extra for shipping.
I'm still thinking on it.
Wall scrolls are actually pretty large, though. I mean, this one is over 100cm tall, and 77cm wide. That's not a bad price, in my opinion [after the 25% AmiAmi discount].