Any interest in creating a book/video exchange?

Perhaps better as its own group, please give your thoughts.

Here's what I'm thinking (and maybe it exists here?)

A place for

1.  Book/video reviews and commentary

2.  More to the point, a place for book/video exchange.  I'm thinking that folks could either sell their used materials or give them away via offer/request (sort of like a freecycle concept)

Frankly, the more I think about it, likely best as its own group.  If so, does anyone have any interest or ideas?

Thanks!