Ruf, known for modifying Porsches, built only one 928 model in 1989, which is now up for auction at Amelia Island expected to fetch between $400,000 a...Ruf, known for modifying Porsches, built only one 928 model in 1989, which is now up for auction at Amelia Island expected to fetch between $400,000 and $500,000. This unique vehicle highlights the rarity and value of bespoke automotive projects, emp...