Well, posting prices of other peoples' work is generally frowned on.
At a basic level though, if you're getting it on eBay, it's not likely to be any of those you listed. It will most likely be a many-generations-down recast of a mystery helmet.
In my opinion, you really don't want to get the helmet anywhere by here, unless there's an eBay auction running by a member here.
At least then you have a fair idea of what you are getting.
In a very vague sense, most good helmet kits run from $125 - $350ish. That's for unpainted / untrimmed.
Also, look at the "how much should i expect to pay" thread to see a bunch of peoples' posts on this sort of topic.