I purchased my PreCertified a week ago. It's a 2002 that is about 37 months old, just off of a 36 month lease from the last owner. I see no marks, damage, indents, etc at all in the vehicle. Honestly, I can not tell that it's used. I live in Columbus, OH, so it doesn't get super-hot, but it is frequently 90+ during the summer and unknown temperature inside a closed vehicle.
-RokleM