I might pick one or two up simply because they are also some of the last of the UV-500. I like the fan back a lot more but I like having the red pips from the circle back, do you think they will start making the fan backs with red pips now?
No. As attractive as some thought they were, the Vipers didn't sell as well as the other brands. No circle backs, no fan backs, no Vipers.
Are they keeping the Fan-Backs in production?
I guess so. They only said circle back so I think fan backs will still be printed... for now.
They said as much on their Facebook page.
Also, for those of you who didn't know, the all-white Black Tiger decks are also being discontinued. There hasn't been a big announcement yet probably because they still have a decent amount in stock. Look in the article below from March of last year - Jason Brumbalow states in the comments that "there can only be one Black Tiger" - more seriously, that they're trying to reduce customer confusion by limiting the decks to a single style. So the Black Tigers will be available only in red/white, and the Vipers will be available only in all-silver fan backs.
http://blog.ellusionist.com/the-last-of-the-uv500-air-flow-decks/