I wasn’t implying you were doing something wrong by the way - and eBay isn’t the wrong place to look. Nice pie pan dialed Constellations simply don’t come up in no-reserve auctions very often.
@Shabbaz advise is a good one, even though it was written with a wink, and the same is true for eBay. It takes persistence and patience, quite possibly for a few months or even a year. I wouldn’t limit the search to Canada by the way, but you do of course have to factor in import taxes.
The jumbo Connie you posted is a different matter, as these are even more uncommon than pie pan Constellations.
When looking for prices, check OF listings of the past and use the ebay search for sold articles. The fixed prices people are asking for current offers don’t tell you much about how many of these actually do get sold. The classifieds here are also a good place to check regularly, but well-priced examples do move quickly.
Allow me to also add an example: This 2852 was sold I think about half a year ago on ebay. Good pictures, description was alright, the seller even granted the right of return for 2 weeks or so. Ended at ~1450€. It’s not perfect, but still attractive in my book. I doubt the OE would offer this for less than 3000€ tbh, hence my comment about market value vs OE prices.