Quoted from pin2d:I don't think they really have sales, because they don't need to - they consistently sell out at their current price.
Also, I want to give a plug here for Randy at ColorDMD - I've twice emailed him a question after 8 PM, and both times he's responded within 15 minutes or so. Their service is fantastic, as is their product. Big fan.
But clearly whoever is currently manufacturing these for them is too expensive. I would love to know their cost (and profit) on these but I'm guessing it's not nearly as good as it should be. They could probably sell 5X as many as they are currently selling if they got the price much further down. When you can buy a 32-inch Samsung 1080P television for $240 these days (just a quick example) there is no reason these should cost $400.