You might have to look on the shipping box, I've seen where that's the only indication. There might be a sticker on the seat tube just above the bottom bracket housing. Kent imports a bunch of different branded bikes........none of which that I have found are anywhere higher than bottom end, lower tier...etc.

I buy "five for $75", "three for $40" and the like off of CL then sell them for $35 each. Kent is more often than not the importer, from what I can find. (Although I don't really look too hard or care too much!!)