You talking aboute5-2650 v4? true that you can have them for $5 each. But they are not for 2011 MB and would require a newer MB. The deal i am listing is only good for people that already have 2011 or x79 MB and want to max out their potential. Other than that, i don't really recommend it.
Even as a secondary pc or server, it's kinda up in the air with regard to the cost. The problem is that even though the ram and cpu for 2011 is dirt cheap, the MB is not. And of course you are pretty much limited in performance to these cpus. can't go any faster..