Wow, is that really competitive nowadays? It's about three years since I used Orc, and I seem to remember the platform was around 2.5k USD.
Yes, I'm familiar with the pricetag of Apama. And that's just the software, not having someone teach you to use it or configure it or customize features for you... But, today, through a European equities broker that shall not be named in this context, I was quoted Orc Trader for what equals $1.300. That is of course without any colocation, but surprisingly cheap. Perhaps they're subsidizing the cost..