Foreign visitors to communist East Berlin used to smile at the smelly little Trabant motor cars that later came to symbolize the fall of the Berlin Wall. But enthusiasts are now paying out large sums of money to buy one. “The average price of a well-kept Trabbi 601 has risen to around €7,300,” said expert Gerd Heinemann from the consultancy firm BBE Automotive “and they just keep going up in value”. It is a remarkable turnaround for a fragile car which was once a global laughing stock for its puny two-stroke engine and the clouds of smelly blue exhaust fumes it belched forth. The Trabant 601 b…