Value of PR 6 domains
 

What do these things go for with good backlinks , a rough est,.

depends on the outlinks i would say

eg you have a pr6 with only 1 outgoing link to eg
wkuegfwoke.com
that domain might get a PR5

if the pr6 has 100 outgoing links wkuegfwoke.com might only be a PR3 or less/more

hope im right because thats what i expirienced hehe ;)

Depends on category. I mean if it's PR6 because it's in some obscure category, probably not much, but if it's PR6 for say, car price quotes, it's gold. I sold a PR6 in that to Stoneage, with 3k of traffic daily for 22k.

totally depends on what domain is

Probably, but people who are purchasing PR domains are most likely going to use it primarily for the PR.