I am not the guy to comment of running eight value.
But I can suggest on looking at what is taken and what is not. And try to figure out if there is any rhyme or reason to it. (Try seeing who owns it,are they domainers or endusers, are they symmetrical, are the phone numbers, codes, etc)
Taken
8-888888888.com
888-8888888.com
8888-888888.com
88888-88888.com
888888-8888.com
888-8888-888.com
8888-888-888.com
Available
88-88888888.com
8888888-888.com
88888888-88.com
888888888-8.com
8-88888888-8.com
88-888888-88.com
88888-8-8888.com
Good Luck