I'm not sure I know anything about price for your area, but when talking about multiple cores on multiple cpus, I just usually multiply them out to work out a rough equivalent. so 8 * 2.26 = 18.08 and 4 * 2.66 = 10.64, so about half the CPU output. But then there are the drives, memory, age of the systems, etc to allow for as well. cjc On 02/05/2012, at 3:43 AM, catsoul wrote: > > On May 1, 2012, at 10:40 AM, Zane H. Healy wrote: > >> There are a lot of factors in play, so without more data it's hard to say if an upgrade is worth while. > > > I apologize; I may not have been clear. I want to sell my Mac Pro. I'm trying to gauge where it is in price in the marketplace..how much I should ask. > > > cat