is seller allowed to unilaterally allowed to cancel a sale by refunding payment???

[reallynicestamps]

No he has to ask you for a Mutual Cancellation.

You can then agree or ignore the request and the transaction will end. Both you and the seller can leave feedback. You can also leave Detailed Seller Ratings. The normal Rating is Five Stars. The lowest Rating is ONE STAR. If a seller's DSRs drop below 4.3 his ability to list and sell on eBay may be severely restricted.

However.

Did the seller have a shipping rate to Canada? If not did you ask for a shipping quote? Did you pay the US shipping rate instead of the Canadian shipping rate? Did you ask for your purchase to be shipped to a US address although that address does not appear on your Paypal account?

Contact the seller and ask what the problem actually is.

But if he doesn't want to take your money and ship to you, eBay is not sending two guys with black leather jackets to his doorstep with a message.

[brandeentertainment]

I look at it this way .. Is a buyer allowed to bid and not pay .. Technically no ...

Now in General is everyone perfect ...NO

Contact them maybe there was a mistake in listing or something along those lines .. Maybe they did not mean to sell to different countries ...

Either way contact to find out an go from there .. Keep in mind nobody is perfect and anyone who expectes perfection need to look in the mirror and realize it does not exist even in the biggest,richest companies in the world