I am in the USA buying NSRPF using Charles Schwab, eTrade, and Fidelity and I noticed also I usually have to pay 1-3 cents more than what I see on the Canadian quotes. Maybe it's because of the exchange rate?
Anyway, here's another website that I use to go see the transactions of NVO in Canada:
http://www.cnsx.ca
http://www.cnsx.ca/Page.asp?PageID=2013&AA_RecordID=323
Go Novo!