This goes for all eBay auctions not just this seller.

The only problem with eBay (for us non-Americans) is the "extras" that aren't always easy to calculate in the price while you're trying to win the auction.

Exchange -- yes it is calculated but you still have to figure that into the equation and sometimes it can be different as exchange rates do fluctuate.
Duty -- US clubs are duty-free but Mizuno's for instance have duty (at least I paid it on my driver last year)
Shipping -- why it should cost so much I can't figure out (I work for the post office in Canada and I'm pretty sure shippers are making a bundle on marking-up the shipping.
Brokerage fees -- here's the one that can be very costly. (Around $50 on my Mizuno driver last year).

So a good deal at auction can easily add another $100 in extra costs.