I did a bit of research on Ferrari forums and the Mondial QV (Quattrovalvole) is a pretty well respected car. It's also thought of as a better car than the 308 because it came with rust protection so most examples are reasonably rust free.
Here's what someone said in an American Ferrari owners forum about the Mondial: "I have used my Mondial as a daily driver for the last couple of years. It is reliable, sounds, smells and looks great. These cars are amazing to drive. Of course service costs are huge, a full engine rebuild can cost as much as a good Mondial is worth. I purchased my car with a fresh 30K service. So far, I have averaged about $1500.00 year in additional maintenance costs."
So, as with any old supercar, whilst the purchase price may be low the ongoing costs can be high. It's also important to buy one in as good condition as possible. This car needs to be thoroughly checked by a specialist before you go anywhere near it.
However for just £12,000 this would be a sensational buy, although I wouldn't countenance buying one as your only car.
Full advert below.
Ferrari Mondial QV 2dr 2.9 1985
2 Doors, Manual, Coupe, Petrol, 62,000 miles, Rosso red. The car is finished in the most desirable Rosso red and trimmed in the finest double stitched Connolly hide. Rolling off the production line in 1985, this model was fitted with the 3litre Quattrovalvole power plant. It has four valves per cylinder and a combustion chamber design, this engine was purportedly based on the early 80's F1 engine.
When new this engine design produced an impressive 240hp at the flywheel immensely powerful for its time and can easily hold its own today. Sporting all the usual Ferrari refinements, this Mondial is fitted with classic five spoke Ferrari alloy wheels, sun roof, tinted glass, quad outlet exhaust, Veglia instrumentation, dog leg gated gear change, three spoke steering wheel and much more.
The car has been lovingly maintained by all it's owners and this combined with the extensive mechanical and aesthetic recent improvements, means the car is in tremendous condition. Air conditioning, Electric sunroof, Electric mirrors, Alloy wheels. Insurance Group:20, At 62,000 miles the car was fitted with a new cam belt and this year work was carried out repairing electrics, replacing starter motor, gearbox linkage and refurbishing interior.
The car comes complete with owner's manuals, stamped service schedule, numerous old MOT's, maintenance and previous owners records and the original suede documentation wallet. 11,950 ono
Link to advert is here