Thanks for the reply. It's hard doing the conversion between CDN and US $ these days as it varies by small amounts frequently but the dollars are close to par. Where I found the problem came in was on a recent transaction Paypal charged an additional amount to convert from US to CDN dollars on top of the regular Paypal fee. When I questioned it they said it was no different than what a bank would charge.
I suppose it all works out in the end for Paypal and the banks but as a consumer somehow we lose out regardless of which dollar is higher than the other at any given time. I've decided to keep it easier by just dealing in Canadian dollars. Not sure why there isn't an option for that when listing on this For Sale forum.