[Christien]

Wow. I'm always very careful with estimating shipping for exactly this reason, but when I screw up, I eat the difference. If it was a huge difference (more than $50) I'd offer a refund to cancel the deal. But I certainly wouldn't ask for $20 more because *I* screwed up, especially after 10 days.

Let me guess, he forgot to take into account the fact that you're north of the border, right? I say tough luck for the seller, and if he tries to call you out publicly here on Pelican for being a lousy buyer, point him here.