Anyone have experience shipping expensive cards from the US to Canada? Is there a cheap tracking option available? From the USPS website it looks like 15 for a pwe with tracking. And bubble mailers are like 25? Does this sound right, or can anyone with more experience chime in?

Tracking is expensive both ways but more expensive from can to us then us to can. Probably due to the dollar difference. I have traded to the us from canada with only a little more wait time than in country. Luckily so far i havent had any issues except when shipping to romania. Pwe standard shipping is good but if its a large trade it may be worth the tracking. But it isnt cheap.

If you use the paypal method (https://www.paypal.com/?cmd=_ship-now), select USPS, First Class international, package size Large Envelope, and I usually select a generic 2-3 oz, throw it in a bubble mailer, and it comes out to $2.82 with shipping.

Edit: Don't forget to to sign it on the customs line, and I usually put the value at $1, and call it a "photo" or something, so that they don't get any additional charges from customs (and no douchey postal workers get any ideas.)