[ae1969]

Global Priority Express (U.S) = Express Post (Canada) (close enough)

quickest/safest/easiest way.............. tracking numbers that are actually used on both sides of the border by both postal services.

If I were to ship those same 4 filters from Canada to the U.S it may cost me 15 bucks canadian (~12 U.S)

USPS (Regular post) is cheaper (95% of the time it will get there unharmed) (Pretty much your ~7 U.S)

Now if you want to talk about shipping problems (MEXICO) CROOKS.

(I would avoid UPS and FedEx.... although I find FedEx having a lower brokerage fee)