Porsche Buyer's Guide
Porsche supplies more live auction lots than any other marque in our records: 122 at the last count, 88 of them 911s. It is the most liquid classic market in Britain, which cuts both ways: prices are transparent and fair, and genuine bargains are rare. The value hunting happens away from the 911.
The story, briefly
The 911 arrived in 1963 and has been in continuous development since: air-cooled until 1998, water-cooled thereafter, with the 996 generation marking both the changeover and the value floor. Around it, Porsche built the transaxle cars (924, 944, 928, front-engined, perfectly balanced, long unloved) and from 1996 the mid-engined Boxster and Cayman. Every one of them shares the marque's defining trait: engineered to be driven hard indefinitely, provided the servicing is done.
Which Porsche, for what money
911 money. Nineteen sales from £12,430 to £110,000, median £40,612. Air-cooled cars occupy the top half; the 996 and base 997 generations occupy the bottom and remain the affordable entry, £12,000 to £25,000 buying a usable car. A single 356 sale at £75,000 marks the pre-911 collector tier.
Transaxle money. Two 944s (£11,531 and £20,250), two 928s (£16,313 and £27,456), three 924s (median £5,625, with a £34,500 outlier for an exceptional car). These are the enthusiast's value tier: galvanised bodies from the late seventies onward, robust engines, and prices still a fraction of equivalent 911s.
Mid-engine money. Four Boxsters (median £9,680) and four Caymans (median £14,485). A £6,000 Boxster S delivers most of the 911 experience; the market knows about the engine issues (below) and prices accordingly.
What goes wrong
Air-cooled 911s: corrosion (pre-galvanising cars especially), top-end rebuilds on high-mileage engines, and originality questions that only a specialist inspection settles. 996/997.1 and first-generation Boxster/Cayman: the M96/M97 engine's intermediate shaft bearing, a known and now well-understood failure; an invoice for the uprated bearing or a rebuilt engine is worth real money, and bore scoring is the other check. Transaxles: timing belts on 924/944 are service-critical; 928 electrics reward patience. Nothing here is unknown territory; Porsche's parts support and the specialist network are as good as the hobby gets.
Our view
For driving and keeping, the transaxle cars are the pick of our data: a 944 at £11,000 to £20,000 is a galvanised, 50/50-balanced coupé with decades of specialist knowledge behind it and room left in the price. Among 911s, buy the best-documented 996 or 997 rather than the cheapest air-cooled car; the £12,430 entry point in our records buys the start of a bill, not the end of one.