Ford Mustang (S650)

Start with identity, paperwork and originality. For the Ford Mustang (S650), the strongest cars have a continuous ownership file, VIN and door-tag consistency, a Marti Report where available, original window sticker where possible, and evidence of major service work by recognised Mustang specialists. Delivery-mile status, factory build sheet, MSO on GTD and 60th Anniversary cars, dealer-invoice paperwork; on Dark Horse, Handling Package and factory carbon-wheel option are decisive.

5.0L Coyote V8 (revised for S650), 480 hp / 486 hp (Active Valve Exhaust); Dark Horse 500 hp with unique chassis tuning, MagneRide dampers and auxiliary coolers. Ford GTD: 815 hp supercharged 5.2L with mid-rear-mounted transaxle and active aero — service is Multimatic and Ford Performance only. A proper pre-purchase inspection includes cold-start behaviour, compression or leak-down testing where appropriate, factory-tool diagnostic scans on later cars, underbody photography, suspension and chassis-point inspection, brake condition and a road test long enough to expose heat-related faults. Deferred maintenance is almost always more expensive than buying the better-sorted car.

Mustang bodyshells are unibody steel and vulnerable to hidden collision repair and (on earlier cars) corrosion in floors, torque boxes, cowl and rear frame rails. Use a paint-depth gauge, a lift inspection and a specialist familiar with the generation. Documented cosmetic restoration is acceptable; concealed accident or structural repair must be priced severely, and modified cars must be judged on the quality and documentation of the build.

Ford GTD (limited multi-year production, Multimatic-built), MY2025 60th Anniversary Package (1,965 units), Dark Horse with Handling Package, and any early low-mile Dark Horse in Blue Ember are the identifiable collector tiers. EcoBoost and GT Premium form the everyday pool. Colour, transmission, option packages and limited-build variants move values significantly. Buy the best-documented example in the most desirable specification you can justify rather than a tired example of a rarer derivative that will need years of corrective work.