In my opinion, you are stressig yourself way too much about this. i also think you're trying to jam this purchase into your pocket, and I've always found this to be detrimental to my best interests whenever i've tried to do something like this.

the first white one, ok, you passed it by, for probably good reason. Then the black one has a tranny leak, and noone knows where it's coming from? Not good, but probably fixable. The last one too many miles, I think is a reasonable assessment.

My suggestion is to wait for the right one. I found my white 2006 coupe in dec 2008 for 14,500, 10K on the clock, perfect condition, so they're out there, and just wait a bit and you'll find one that's right for you.