Your "gut feeling" would make you pay a sweet amount for a bootleg if you were to buy the one at eBay. Of course it's hard to distinguish between the real one and the one that's being offered right now but that's the idea behind a really good bootleg; which the one kanji linked obviously is.
To put it simple, kanji - don't buy that Carue figure since it's a bootleg for sure. You may not see any significant differences at the moment but just use common sense. It will save you your cash.
Thanks for the advise Eneru. As the seller seems to be legit, I think what I may do is make them aware that what they are selling is bootleg and then perhaps make them an offer of maybe $50? and see what they say. $50 for a bootleg Carue's got to be worth it, not that I'm advocating it's production.