the second hand goods does not count in the GDP in current year..but the year of production
also..if the sale of second hand good involves a series of service...e.g. the commission of sales should be counted into GDP in current year....
if there is any mistakes or wrong concepts...welcome to correct the answer...
i aim to learn from each other....
used goods should not be accounted into the GDP,while the added value should be accounted.
pls read P27 of macroeconomics by Mankiw &Taylor,which has an explanation.