The weight of your items don't look like they should equate to that much of a shipping charge IMO.
One of the reasons I've refrained from ordering primarily from AG is because of the shipping. Just ordered a bottle of M7 Show Car Glaze, couldn't find it in Canada so got it from elsewhere within the States. Even though AG was $10 cheaper for the product, with shipping I still got the item for less.
Some sales are still certainly great to take advantage of though.
E-shine still does a good job of trying to stay competitive in CAD with their pricing, but a agreed, little frustrating when trying to get a gallon of ONR and its out of stock for 4 months.