Here's the run-down from FLATSIXES:
Air Cooled Turbos were shy of high estimates.
2018 Porsche Scottsdale Auction Results | FLATSIXES
1997 Porsche 993 Turbo - Realized:
$179,300 vs. Est. $175,000 - 225,000
2007 Porsche 997 Turbo Coupe - Realized:
$50,600 vs. Est. $45,000 - 55,000
1996 Porsche 993 Turbo Coupe - Realized:
$137,500 vs. Est. $140,000 - 160,000
1994 Porsche 964 Turbo S 3.6 'Flachbau' - Realized:
Unsold vs. Est. $600,000 - 700,000
1988 Porsche 911 Turbo 'Slant Nose' Coupe - Realized:
$162,400 vs. Est. $200,000 - 250,000
1976 Porsche 911 Turbo Carrera - Realized:
$173,600 vs. Est. $175,000 - 225,000
1989 Porsche 911 Turbo Coupe - Realized:
$156,800 vs. Est. $160,000 - 200,000
1987 Porsche 911 Turbo 'Slant Nose' Coupe - Realized:
$156,800 vs. Est. $150,000 - 200,000