Condensed from the full methodology page:
- Price disclosure — is the out-the-door number computable before you arrive?
- Vehicle disclosure — inspection sheets, history reports, title status offered unprompted.
- Return/remedy terms — written return windows or warranty, and evidence they are honored.
- Paperwork hygiene — itemized buyer's orders, declinable add-ons, lawful doc fees.
- After-sale accountability — how disputes and delivery defects actually get resolved.
Five signals, twenty points each. The scale is deliberately boring — trust usually is.