You can get that same sight in Canada for about $50. What you'd pay in US funds + shipping + duties / brokerage isn't worth it really.
But as The Saint said, high end optics are export-restricted from the US. However, there shouldn't be any issue with this one. Sounds like the seller just doesn't want the hassle of determining what is and isn't restricted, so he just doesn't ship out of country at all.
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