J and M Coins & Jewellery from my home of Vancouver has a pretty complete site with pricing for Canadian coins, and they stand by their website prices.
I found myself in a similar situation to yourself, but with fewer coins to deal with. You may want to figure out which coin is the best in terms of condition where you have duplicates. Charlton or the other sites already mentioned will help determine whether or not you have rare varieties before you start culling.
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