They are the blue version of the CKM500. I bought these at the beginning of June. They are in perfect condition. I have not used them much since I received my TF10s at the same time and the UE have been getting most of the listening time.
The tips and the carrying case are untouched...I used my own tips from another IEM and I my hard carrying case.
I'm selling them to fund another purchase.
The price is $65 (including shipping to ConUS).