How much are classic cars worth in these troubled times? The answer, as ever, is what people are prepared to pay for them, and there is no better way to find that out than at a no-reserve, everything-must-go, auction. There’s just been one of those, with 100 or so very tasty machines from the Petitjean Collection crossing the (online) block, and the results make interesting reading. Sportscar sale of the year? Could be. Look away now… or be ready to kick yourself.