We are following testarossa's value for a while now, because the spreads bewteen several cars are too fascinating. The spread at Russo and Steele's was 40 k$ for cars with similar mileage.
The price achieved for the 456 was unusual high.
No surprise was the not selling Maranello as it looks that a salvage history can not be excluded.
Here are all results from Russo and Steele's:
86183 90 Testarossa Black/Beige LHD US ZFFSG17A2L0086183
Lot # 2183 Sold at $115,500. 18,000 miles
132380 03 456 M GTA Black/Beige Daytona seats Nero Piping LHD US ZFFWL50A730132380
Lot # 2177 Sold at $72,600.
84876 90 Testarossa Rosso Corsa/Beige LHD US ZFFSG17A1L0084876
Lot # 2252 Sold at $69,300.12,000 miles
115326 99 F355 Spider F1 Rosso Corsa/Nero Rosso stitching Nero Top LHD US ZFFXR48A5X0115326 rear Challenge Grill Shields Nero Calipers
Lot # 2328, dns, 29,000 miles
103084 7/95 F355 Spider Giallo Modena/Nero Nero Top LHD Manual US ZFFPR48A1S0103084 Nero Calipers Tubi
Lot # 2366 without reserve. Sold at $50,600.
137954 04 360 Modena F1 Grigio Titanio/Beige Daytona seats Blu Scuro Inserts Blu Scuro upper dash & Steering wheel LHD US ZFFYU51A340137954 rear Challenge Grill Giallo Calipers Tubi
Lot # 2409 Sold at $69,300.
13659 70 365 GT 2+2 Blu Caracalla/Nero LHD EU ass. seq. # 731
Lot # 2446, dns, 82,200 km
90679 91 348 ts Rosso Corsa/Beige LHD US ZFFRG35A9M0090679
Lot # 2500 Sold at $42,900.
122186 00 550 Maranello Argento Nürburgring then Grey met. then Blue/Nero LHD US ZFFZS49AXY0122186
Lot # 2605, dns, 14,000 miles
140342 05 360 Spider F1 Rosso Corsa/Beige Daytona seats LHD US ZFFYT53A750140342 Aluminum Calipers Shields front Challenge grilles
Lot # 2666, dns.