If you're removing the tax then the price you want to compare to in US dollars is $350. But on top of that, I think it's unfair to act like the tax on the 'extra' part of the price is unavoidable. I only calculated tax on the US price.

Still, either way you calculate it, the extra price is somewhere between 50 dollars and 50 euros. And since it has a perfectly good warranty in the US, I doubt that's the difference. At face value it really looks like one of those ripoffs that scribble out the $ in the price and put a euro or a pound on top of it.