Fulltime Amazon bookseller here
yes you can sell books on Amazon -You can register as a non professional seller and not pay the £30.00 monthly fee (it is £25.00 plus vat) , however the selling fees are then higher
In my opinion it is not really worth it if you only plan to sell a few books , there are good reasons why you see so few hobby booksellers on amazon compared to ebay -
It is easy to list , but amazon fees are high and they now carry out seller verification checks , the customer service to sellers is also dreadful.