The best way to sell your painting would be through an auction house in or near your area that offers artwork.
This auction house, though not in Canada, has sold Burchett's work in the past:
Dreweatt Neate, Newbury (Donnington)
RG14 2JE Newbury
Berkshire United Kingdom
+44 (0)1635 553553
There are also several other ways to sell your painting. You can go through a local antique shop or local auction houses. Pawn shops are good for an outright cash sale.
A shop takes in inventory to sell for a profit, so they will offer you a percentage of the price at which they may be able to sell to a willing buyer someday.
An auction house will take a percentage of whatever the end sale price may be.
Another option would be to list your items on Craigslist yourself at a fair price. Craigs is free and they do not take a fee, so that is where you will make the most out of the end price. I do suggest, that if a buyer contacts you through Craigs, that you meet them at an agreed upon location - I do not recommend letting a stranger meet you at your home.
Online auction options would be Ebay, Etsy & Amazon. Though bear in mind, those options involve packing and shipping.