THE SPECIALIST Andy Prill
"Mechanically they're not that complicated unless you get into a Carrera, so most of the risk is in making sure the body is good. There's a lot of shape in a 356, and on badly restored cars that's what lets them down.
If you get that wrong it can become very costly. A body restoration, including paint, starts at £30,000 and can rise to £100,000.
Andy Prill Porsche 356 specialist
"Open cars lose a lot of rigidity despite having reinforced sills and floors, so it's even more important that the overall body structure is strong.
"Other than that, it's all the normal checks. It’s basically VW suspension that was redesigned by Porsche. Engines can be expensive to rebuild, and range from £6500 to £10,000 for an ‘as new' unit.
"There are very few Gmund cars around and they change hands for exorbitant sums. Speedsters are the most desirable body shape, and Cabriolets are more sought after than Coupes. No matter what model it is, look at provenance, history and bills. If you're in any doubt, have it inspected by someone who knows these cars"