Swung by Valley Truck Center in Racine over the weekend since a few people here asked about them. They keep around 71 vehicles, mostly diesel pickups. They were totally fine with my mechanic doing a once-over, which honestly settles half the trust question.
Lot address: 5423 Haul Rd, Racine, WI. Visitor parking: Front-lot customer stalls facing the office; overflow on the side street near Racine lot gate.
Paper side: licensed with the state (looked it up), about 96% of stock has title in hand per the office, and they offer a 30-day/1,000-mile powertrain warranty.
Overall: good people to deal with. 11 years in business around diesel pickups, doc fee $349 and it's on the window sheet, no games. I'd send a family member there.