K1 unis on ebay for cheap!

I don’t think you can use multiple coupons, but you’ll end up saving around 10$ more depending on how much shipping to you is.
K124 has some specs here, I think they all have 135mm or 140mm cranks.
I think the Alien Backflip and the Green Spirit are the same frame with different colors. I’m not positive about the XTP but I think it may be the same frame with lighter cranks/different colors. Perhaps the Domina fits into the same category but someone else would have to confirm or deny that.
Most people seem to dislike the Devil series (more here on that)