I never even look at feedback. if they've been here long enough, I will generally have a "feel" for their reputation, and I'm here often enough that I would have seen someone bitching about them.
if they are new and respond to PMs or questions with short answers like "No." "yes." etc, then I skip them because they are most likely an idiot, or if they are too busy to type out a complete sentence, then they are probably too busy to actually make sure the item is as described, pack it properly, or ship it in a timey manner.
And it doesn't matter how good the feedback is, if they say "make an offer", then I move along to the next person...