Do you prefer to sell off your things or prefer keeping them forever?

For example, would you sell off your books, cd's, dvd's...etc. after using or do you prefer to keep your things forever even though you seldom use them anymore?

I belong to the hoarder side where i like to "collect" things even though i don't use them anymore. The thought of the things being there makes me happy.

I think every human is built with a hoarder-istic compulsure...it may have developed over human evolution.
So, do you hoard?
