Books

Books can be one of the easiest products to sell.  They are very easy to ship as well.  There is a huge market for used books if it is a book that people want.  Also, books can take years to sell, but you never know when someone wants it.  

Older books that are rare are very collectible and sellable.  However, be careful with the older books as they may contain mold or lead or arsenic in the book cover if it was made with such chemicals over a hundred years ago to get a color that was wanted.