That did not surprise me, since Microsoft discounted the cyan Nokia WH-920 Purity headphones in its store. Black and magenta are $100, but cyan are marked down to $39. That seems to indicate that the cyan colour is not going to be available on future devices.
i so wanted my lumia 920 to be blue/cyan but it wasn't available when i went to buy it (in Chile) it was only on yellow, my sister got a black one one week later (call me messiah), she's dissapointed with the Line app tho :/
I'm not sure. I think some colours are carrier exclusives, and I'm not sure if the carrier or the manufacturer EOLs them. For instance I remember AT&T had a red BlackBerry Curve 8310; the other carriers didn't have that one.
I just bought one last week, eBay. There were some still there I think. Yeah it was used but I bought mint condition. Its virtually new with no scratches. I live that many don't have 920's let alone a cyan blue.