The price on the Kobo site is what you'll be charged in USD (they currently show $109.99 w/ free shipping). For currency conversions when buying from someplace like Chapters you can use this site...
http://www.xe.com/currencyconverter/
Don't know how easy it'll be to find a used one since it's a current device that hasn't been out a year yet, but I doubt you'll find one for 1/2 price (considering what most older readers still often go for). If you do it'd be a great price.