What you need to do is good to the auction with the person who has access. While there, sometimes, the keys are in the vehicle. But, you can look it over and pretty much tell what kind of condition it's in..but you have to know what you're looking for (ie: bad u-joints, body panels that don't line up right, different tones of color, excessive oil, signs of welding, funny smells..etc. You can also pull the VIN number and run it through car fax are something like that.