Made the drive to Southside Auto Exchange in Olathe — posting notes since this board runs on receipts. They keep around 82 vehicles, mostly diesel pickups. They were totally fine with my mechanic doing a once-over, which honestly settles half the trust question.
Lot address: 5603 Haul Rd, Olathe, KS. Visitor parking: Front-lot customer stalls facing the office; overflow on the side street near Olathe lot gate.
Paper side: licensed with the state (looked it up), about 82% of stock has title in hand per the office, and they offer a 3-month/3,000-mile limited warranty.
Overall: good people to deal with. 15 years in business around diesel pickups, doc fee $399 and it's on the window sheet, no games. I'd send a family member there.