I agree anon, I blasted UPS for the unreasonable brokerage fees and after explaining their rates to an Ebay seller, they shipped an item to me via USPS with the $5.00 fee.
One time I left my cellphone at a friends place in the US and UPS tried to charge me a brokerage fee on it when it was returned!
As for duties, there is a website that describes what the rate is on various items though you have to know exactly what category your item falls under to figure out what the rate is. Do a search on the web of "canada duties and taxation" you will find the site. I would give you the link but 3 times I've found the PDF moved and my link doesn't work.
here it is just in case:
http://www.cra-arc.gc.ca/customs/general/publications/tariff2003/tablewithamendments-e.html