Which vehicles are guaranteed to avoid a salvage designation when I go to register them?

Any vehicle listed with a clean title was never declared a total loss and will register normally, just like a private-party used car purchase. Vehicles listed as "certificate of destruction" or similarly designated for parts-only, on the other hand, cannot be registered for road use under any circumstances — that status is permanent. Always check the title-type field on the listing itself; it's the single most reliable indicator.