From past experience USPS tracking stops at the border... my wife has received packages, with tracking, from her family in Alabama and the tracking would NOT show the package after it left the U.S. and Canadian tracking does not pick up where USPS left off. :)
I use tracking (delivery confirmation number) on First Class all the time...it's free with my shipping software, Stamps.com but you can get it at the post office, also, for a few cents more....First Class has to weigh under 13 ounces, is all. Wish you lots of bids on this great auction! :)