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Good questions for the seller to answer :p And please, we are talking about amount of money less than 100 bucks.. don't take it too serious..

Lower 3 is botan, tenjo and mejiro.

Ask him were did he buy them :) That would actually mean are they real or not.
If you are comfortable with the answer, grab 1 or 2 sets of lower 3 and as much as you can of koma, you shouldn't...