some help needed about domains bh niche

Hey everyone,
some help is needed, still can not understand how domains are valued...
And I know someone bought w w w 8ballpoolhacktool c o m
and I am really interested what does it worth ? Is it any good ?
what would be the difference between that and 8ballpoolhack com ?
Thanks in advance.

They're valued like everything else in life: supply and demand.

FB.com is worth a few thousand bucks because it's short. Then one day Facebook comes along and pays millions for it....

That's how domains are valued: based on seat of the pants and supply/demand.