Looking To Buy Gen3 Auction

Greetings Everyone!

I currently have a 2011 Prius three, not III because only 2010 used uppercase Roman numerals for model designation, Solar, 70k miles - have had it for 15 months now and have put 23k miles on it. Love the car, only issue has been the 12v Battery needing replacement.

I am looking to purchase another Prius, but instead of going to dealer like last time, I am going to purchase via Manheim Action. Friend is a dealer so he will be with me to make the purchase. Post sale reports show many 2012 models selling for under 10k, and 2011 and 2010 down to 7k (with around 100k+ miles.)

My question is, are there any tools, ODB2, Bluetooth, etc. scanners that I can check the cars with prior to bidding? Anything that will give me condition/status of battery or any error codes that might not trigger a check engine light? I have an android phone and I use torque for basic info but I was looking for something more in-depth. There will be a good 30-40 Prii at the action and I just want to make sure I don't pick the wrong one ;-)