You can find Yukons with 100k miles for $10k. I don't know why you would spend more for the same truck with more miles.
$8600 and 80k less miles than the gray one you are looking at.
http://www.crownchryslerjeepdodge.com/searchused.aspx?st=price%20ASC&pn=25
http://columbus.craigslist.org/ctd/3019687679.html
http://columbus.craigslist.org/ctd/3026579912.html