Question: What is the total value of shipped vintage car orders from 2003-2004?
SQL: SELECT SUM(T2.priceEach * T2.quantityOrdered) FROM products AS T1 INNER JOIN orderdetails AS T2 ON T1.productCode = T2.productCode INNER JOIN orders AS T3 ON T2.orderNumber = T3.orderNumber WHERE T3.status = 'Shipped' AND T3.orderDate BETWEEN '2003-01-01' AND '2004-12-31'