I really do not understand why Canadians are attempting to equate their lousy postal system with our own in the US

Is tracking an expensive proposition in Canada? Yes. However, it is downright cheap in the US but that is apparently irrelevant in la-la land. As mentioned by weerdsteev, USPS carriers will pick up your outgoing mail from your delivery location so there is no 30 mile snowmobile trek to the Moosebend Post Office in the Northern Territories to worry about.
With nothing more than a scale and a printer, you can print electronic postage directly from PayPal, there is no need to make any trip to the post office for anything less than 13 ounces. I typically charge $3 for postage on
ebay which includes a securely packed padded bubble mailer, Delivery Confirmation, and bubble wrap if I am mailing a slab.
Dropping a coin in a first class envelope, regardless of postage charged, is one of the worst ways to ship a coin unless you do it properly and the majority ends up doing it wrong. A rigid object in an envelope renders the envelope unmachinable, it cannot be fed through the automatic sorting and postmarking equipment due to the need for flexibility. It may make it through but the chances of the envelope being damaged are high and envelope damage usually equals a lost coin. The only way to do it correctly is to add an extra 20 cents postage(nonmachinable surcharge), enclose the coin between two pieces of cardboard or other thin rigid sheets, and mark the outer envelope as NONMACHINABLE. For the last part, I use a red ink rubber stamper to add it to both sides of the envelope. I have used this method a couple hundred times for inexpensive coins and every single one made it to the delivery location with coin intact and I did not even have to charge $3 for that level of service
