I am aware that secondhand goods are not counted in GDP due to double counting issues, but I want to ask about a specific case of transaction of second-hand goods.
For instance, what if a student buys a book for 20$,
uses the book for a bit, and then sells it to a college bookstore for
40$? And what if the college bookstore sells that used book to another
student for 50$?
I know that for the second case, the 10 $ (50 $ - 40 $) will be counted in
GDP because this represents the bookstore's services created for providing
But what about the first scenario, where a student sold the book to the
bookstore for 40 $?
Would the 20 $ (40 $ - 20 $) be counted in GDP? Or would
this just count as the increase in the student's wealth?