If they had the title it wouldn't be a big deal, you just need to have the pink slip in hand the sell it to picknpull, but without a title it's kind of sketchy. If the car is registered in their name they can get a duplicate tithe for pretty cheap, and wouldn't need to pay any of the late registration fees since its just an application for a replacement pink slip

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint