I did not get charged sales tax (LA). Shipping for my one item was $17 but I figured it would be a little more because of it being an uncut strip of cards (fairly long).
There is actually a breakdown of all shipping charges on their site -
http://sports.ha.com/c/shipping.zx
My item was:
Up to $99 is $5.15 (base service)
In the item description it tells you what type of additional requirements there are to ship:
Trading Card Set or Notebook, Large is $12.10 first item + $4.85 per additional item
So mine was $5.15 (base) + $12.10 (additional) = $17.25 (exactly what I was charged for shipping)