Agreed much too late for the houses at Amelia. Too often the overhead of placing a car in an auction house negates the best value of an average or above average car. Your objective at these auctions is to stimulate interest in non-Porsche buyers, with extreme low mileage, unique color combos, or rarity. The 930 is surely not rare in the spectrum of these auctions so you better come with a very clean, well preserved example. The Petrol blue/cork interior is a huge advantage. With prices fluctuating it’s unpredictable on the worth at a particular place in time. Are you willing to deal with the contingencies if it doesn’t sell and you find yourself $2-3k into a car you still own? It’s kinda like a hand of limit poker, the more players you have to call your nut-hand the more money you can potentially make. A unique colored cashmere ‘79 930 used in Seinfeld’s internet show sold well under estimates at Gooding last year. Good luck.
https://www.goodingco.com/vehicle/1979-porsche-930-6/