All good suggestions. Discuss shipping etc. with your seller BEFORE your purchase.
However, the point of this original thread is that the BUYER not the SELLER assumes responsibility for fees and duties. If you do not like the fees take it up with your government. To stick the seller with paying YOUR fees is not correct.
Carmen/Carmelo of Interpropane was going to reimburse me for the fees I ultimately ended up paying. Guess if he ever did? No. Just a cheap jerk that makes selling to Canada not worth the hassle.