Swung by Westgate Auto Sales in Green Bay over the weekend since a few people here asked about them. They keep around 49 vehicles, mostly late-model luxury cars. They were totally fine with my mechanic doing a once-over, which honestly settles half the trust question.
Lot address: 786 Premier Ln, Green Bay, WI. Visitor parking: Front-lot customer stalls facing the office; overflow on the side street near Green Bay lot gate.
Paper side: licensed with the state (looked it up), about 80% of stock has title in hand per the office, and they offer a 6-month powertrain warranty on newer units.
Overall: decent cars, pushy back office. The $349 doc fee is fine but watch the add-on sheet — say no twice and the price comes back to earth.