Who are some good online dealers or ebay sellers of Canadian Dollars?
Yes, the voyageur design is a popular coin to collect. Widely available on eBay but I prefer to limit myself to certified coins (particularly for the King George VI series) as fakes are known to be floating around. For more common dates, certification isn’t that important, but when it is a consideration look for coins certified by PCGS, NGC or ICCS and you should be pretty safe.