Bartering, bargaining, haggling, negotiating... whatever you want to call it, it makes me exceedingly nervous, especially in a situation where I don't actually speak the language I'm bartering in. I'm afraid I'll come across as either being ignorant or unfair, or else I'll worry that I'm getting ripped off.
For the most part, Canadians are really no good at this skill. With a few notable exceptions (namely my friend Maighan, who can secure amazing deals from pretty much anyone - "just ask for a deal," she says, when asked for advice, "just ask - lots of people will give you one!"), the thought of negotiating for an item leaves me tense and fearful.
Fortunately, I recently ran across this post from the Globe and Mail. It's focused on bartering in Beijing, but I think a lot of these skills are transferable from one country to another.