Great Deals on 10 Core Mac Pro
OWC has 10 core Mac Pros at an excellent price.
View factory refurbished 10 core Mac Pros
View deals on 6/8/10/12 core Mac Pros
Apple never sold 10 core machines; the CPU in these have been upgraded from 6 core to 10 core by OWC (I use a 8-core 3.3 GHz upgraded one myself). Ten CPU cores are excellent for video work, Capture One Pro and Iridient Developer, and any software that will use all the CPU cores.