The back story on this thing is it was the lady's dad's truck and he passed recently. We exchanged a few messages over FB then she gave me her husband's contact info. We talked and were assured no check engine lights, everything works, clean vehicle, etc. We get down there to find out that neither of them had ever actually driven the truck. The wife drove it over from her mom's house and that was the first time she had been in it. Her husband had ridden in it a lot, but never driven.
I get in to test drive and CEL is on. Walk back over to tell them and she says there's an autozone around the corner, we can go check it. Husband apologized and said they told him no lights. I say no problem, I have my scanner. 2 codes for bank 1 upstream O2 sensor heater circuit. I clear, drive, and it comes right back.
After test drive Burgundy and I look it over close again, and go over to talk. He starts with that 02 sensor is at max a $268 dollar fix. Not sure where exactly that came from but he had been researching while we were test driving.
Between the CEL and not being as clean as I was led to believe (they had it professionally cleaned) we settled on $1k off asking and I was happy with that. After the deal was done and chatting more, her Dad passed 5 weeks ago, had 5 vehicles they're trying to sell, and her mom is just overwhelmed. Other vehicles include a Denali truck with QS and a 3500 dually that was his mobile work shop truck.
Yesterday I pulled an 02 sensor from the parts Denali and seems to be all good.