I know I've said this before, but I would pass on high grade if it was something rare. Not just to collectors, but others as well. I would take my early fanzines over a 9.8/9.9 Space Vixens any day.
Are you saying you would rather go for rare than high grade? If so, I will agree with that. That's why I went on such a hunt for that Back Issues I have. It won't be the only copy for long. In fact, I know of at least two more out being graded now, but it will always be the first one graded! I don't want my obsession to branch out to fanzines just yet so I'm trying to be good about that ::