Audiogon purchase: too good to be true?

Gang,
Need your advice: there's a power conditioner - top-of-the-line....being offered, brand new, unused, for half-price....with box, manual. Seller says he's a dealer, and warranty would be good. Seller's in Canada...I'm in the US; sounds to me like it's too good to be true: a $4,000 piece of gear for $2,000. Am I missing something here? Am I being too cautious?

Thoughts?
Thanks,
Jeff