My brother told me 'trust the Carfax' before I bid on a 2017 sedan at the Des Moines auction last month. I ignored it because the paint looked clean and the interior smelled fresh, so I went to $4,200. Two weeks later the transmission started slipping and the quote to fix it was $800, which was exactly what he warned me about. Do you guys trust vehicle history reports or do you always dig deeper on these auction buys?