Sellers have nothing to do with the rate of exchange.
If a Canadian buyer wants to purchase an item in US$, that buyer has to expect to pay whatever the US dollar is worth that day.
Sellers only get the US dollars stated in the listings. They do not profit from whatever exchange rate exists that day.
Currently it costs Canadians about Cdn$ 1.12 to $1.13 to purchase a US$1.00 or Cdn$ 112.00 to Cdn$ 113.00 to purchase US$100.00
I frankly fail to understand what you are ranting about.
If you prefer to purchase in Cdn$, you will find thousands of Canadian sellers on eBay and elsewhere willing to sell to you.
As far as expecting the Cdn$ to go back above parity with the US$, you will need to be patient, very patient. Most foreign exchange experts expect the Canadian dollar to remain around current levels, maybe a bit lower for the rest of this year, possibly lower next year.
"THE CANADIANS ... ARE THE BIGGEST ... BUYERS ON E BAY.."
You may want to check your facts. Canadians account for less than three percent (3%) of all purchasing on eBay.
"Does anyone know"
Yes.
This applies to ALL eBay international sites (not just Canadians) where an equivalent currency is shown.
Typically, eBay will show the wholesale conversion rate (mid-point between buying and selling).
PayPal on the other hand will reflect the buying rate of a currency if you are the seller and the selling rate if you are a buyer. The difference between buying and selling a currency is called the spread - typically about 5% - divided between buyer paying 2.5% more and seller receiving 2.5% less.
Since the approximate local converted currency value shown on eBay is used by both buyer and seller, it appears to be the only fair way to do it.
It should also be noted that eBay's conversion value is set every morning and will not fluctuate during the day. PayPal on the other hand will change the conversion value at different times during the day to reflect current market condition.
eBay's value is basically for information purposes to be used as a guideline
PayPal's value reflects what it actually costs the buyer or what the seller will receive.
